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Board Hardware wallets
Merits 1 from 1 user
Re: 🔥Seedkeeper🔥 Hardware device to backup your seedphrase - Meet the Ring™️
by
Tibu
on 07/07/2025, 08:27:27 UTC
⭐ Merited by dkbit98 (1)

New video review about the Seedkeeper Ring:



Link: https://youtu.be/O9ehjA3V5QU?feature=shared

Enjoy!


Post
Topic
Board Hardware wallets
Merits 9 from 3 users
Topic OP
Why smartcards are the future of seed backups - Ledger R. Key vs Seedkeeper
by
Tibu
on 25/06/2025, 11:14:59 UTC
⭐ Merited by hugeblack (4) ,Pmalek (3) ,dkbit98 (2)

Why smartcards are the future of seed backups — A look at Ledger Recovery Key vs Seedkeeper by Satochip


In the ever-evolving world of crypto security, the age-old challenge of seed phrase storage remains a critical point of failure.
Whether you’re a seasoned self-custody advocate or a hardware wallet user seeking a better backup solution, the introduction of smartcards into the seed storage landscape offers a promising leap forward.

Two notable players in this space — Ledger Recovery Key and Seedkeeper — both use smartcards equipped with secure elements and NFC.
But despite some surface-level similarities, their approaches, features, and philosophies diverge significantly.

Let’s explore why smartcards are a strong solution for seed* backups, why open source matters in this context, and how these two products stack up against each other.

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🔐 Why smartcards make sense for seed backup

Smartcards are not a new invention — they’ve been used for decades in industries where security is paramount: banking, ID systems, and mobile SIMs.

Bringing this tech to crypto seed storage offers compelling benefits:

- Tamper-resistant secure element: smartcards include a secure chip that protects against physical and software attacks.
- Portable and durable: they’re compact, credit-card-sized, and don’t rely on battery power.
- Encrypted, offline storage: NFC communication enables air-gapped operation with secure cryptographic protocols.
- Standardized: built on proven standards (e.g., ISO 7816, JavaCard), making them interoperable and resilient.

These properties make smartcards an ideal medium for backing up seed phrases (aka mnemonic or backup recovery key) in a secure and user-friendly way — especially when compared to metal plates or paper.

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🛠 Why open source matters

In crypto, transparency is not optional — it’s a core value. This is why open source solutions are generally favored for anything touching sensitive data like seed phrases.

Open source smartcard-based solutions like Seedkeeper offer:

    ✅ Code auditability: anyone can review, audit, and verify the implementation.
    ✅ No vendor lock-in: you’re not restricted to a specific ecosystem or proprietary device.
    ✅ Community trust: a global community of developers can contribute to its improvement and security.
    ✅ User sovereignty: you control how and where your backup is used — not the vendor.

Closed-source solutions, even from trusted names like Ledger, carry inherent risks: you’re placing complete trust in the vendor’s infrastructure, intentions, and future decisions.

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📊 Comparison: Ledger Recovery Key vs Seedkeeper



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⚠️ Drawbacks of the Ledger Recovery Key

While Ledger’s Recovery Key product introduces a more user-friendly and secure backup process than seed phrases on paper or metal, it also raises some important concerns:

1. Vendor lock-in
Ledger Recovery Key is tightly coupled with Ledger’s hardware wallets and precisely with the Ledger Stax and Flex — the most expensive devices. This centralization goes against the self-sovereignty ethos of crypto.

2. Limited open source transparency
While Ledger has open-sourced the applet used in the Recovery Key smartcard, the broader ecosystem in which it operates remains largely closed.
The physical Ledger devices that interact with the card — such as the Ledger Stax and Flex — run on proprietary firmware.
This means that although you can inspect the code on the card itself, you cannot fully verify what happens when the card communicates with the device.
This partial transparency creates a trust gap: users must still place a significant amount of trust in Ledger’s closed-source components, infrastructure, and recovery service architecture to ensure their data is handled securely and privately.

3. NFC-only limitation
By supporting only NFC, the Ledger Recovery Key excludes users who prefer or require desktop-based setups. This can be limiting, especially for advanced users or those with mobile-incompatible workflows.

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🔐 Shared security features: what both devices do right

Despite their philosophical differences, both Ledger Recovery Key and Seedkeeper implement strong, industry-grade security mechanisms that make smartcards a solid choice for seed phrase backups.

These include:

🔒 Secure channel communication
Both devices use cryptographically secure channels to communicate between the smartcard and the device (typically via NFC or USB).
This ensures that the data transmitted between the card and your phone or computer is encrypted and protected from eavesdropping or man-in-the-middle attacks.

✅ Genuine card verification
To prevent cloning or the use of counterfeit cards, both products implement genuine check mechanisms.
This cryptographic authentication ensures that only authorized, original cards can be used — helping to guard against supply chain attacks or tampering.

🔐 PIN protection
Before any sensitive action — like unlocking the seed, restoring a wallet, or interacting with external apps — the user must enter a PIN code.
This layer of local authentication ensures that even if someone gets physical access to the card, they can’t extract or misuse its contents without the correct PIN.

These foundational features are essential for any modern hardware-based backup solution, and both Ledger Recovery Key and Seedkeeper have them in place.
The difference lies not in baseline security, but in how much control the user has over the ecosystem surrounding these protections.

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💡Seedkeeper: all the security, without the lock-in

Ultimately, Seedkeeper offers everything that Ledger Recovery Key brings to the table — secure element, PIN protection, encrypted communications, and genuine card verification — but with greater flexibility, transparency, and at a fraction of the cost.
Unlike Ledger’s solution, Seedkeeper isn’t tied to a proprietary ecosystem. It works seamlessly with any BIP39-compatible wallet, whether you’re using Trezor, Passport, Coldcard, Keystone, or even software wallets like Sparrow, BlueWallet, or Electrum.

It’s a truly universal smartcard backup — giving users the freedom to control, manage, and recover their seeds however they see fit, with no subscriptions, no vendor lock-in, and full open-source transparency.

---------------------------------------------------------------------------------------------------------------------------------------------------------------------



🌐 Full cross-platform support: Seedkeeper works everywhere


One of Seedkeeper’s standout advantages is its broad compatibility across both mobile and desktop environments.
It works seamlessly with iOS and Android via NFC, but also supports Windows, macOS, and Linux through its USB/PCSC interface.

This dual interface makes it a true all-in-one solution for managing seed phrases — whether you’re on the go with a smartphone or working from a secure desktop setup.
Unlike Ledger Recovery Key, which is currently limited to mobile and Ledger-specific hardware, Seedkeeper gives users the freedom to manage their seed backups however they choose, across virtually any device or platform.


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And you... What do you think?

Post
Topic
Board Hardware wallets
Merits 3 from 1 user
Re: 🔥Satodime🔥 NFC bearer cold wallet with mobile app + On-ramp
by
Tibu
on 26/05/2025, 10:27:45 UTC
⭐ Merited by dkbit98 (3)
-----------------------------------------------------------------------------------------------------------------------------------------------------------------
Big Promo
Festive season upcoming - Orange pill your friends
-----------------------------------------------------------------------------------------------------------------------------------------------------------------

Get your Satodime with an exclusive discount





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Recap about Satodime

Satodime is like:
- Opendime, but you don't need to break the device to get access to the private key.
- Opendime, but it supports more than just #Bitcoin.
- Tangem, but you can seal several cryptocurrencies at once.
- Ballet, but keys are not pre-generated.

Satodime:
- is affordable;
- is NFC ready;
- can support Bitcoin, Litecoin, Bitcoin Cash, Ethereum and all the ERC-20 and ERC-721 tokens;
- can contain up to 3 secure vaults, meaning you can safely store 3 wallets.
- is trustless, open-source;
- and customizable.

------------------------------------------------------------------------------------------------------

You can grab your Satodime now at https://satochip.io/product/satodime


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Contact

Telegram: https://t.me/Satochip
Twitter: https://twitter.com/satochip
Website: https://satochip.io
GitHub: https://github.com/Toporin
Youtube: https://www.youtube.com/channel/UCPmmfB5PpuwMtha9mbaRNlg
Post
Topic
Board Hardware wallets
Merits 2 from 1 user
Re: 🔥Satochip🔥 Hardware wallet on smartcard (NFC) + Taproot/Nostr/Liquid/MuSig2
by
Tibu
on 26/05/2025, 09:41:42 UTC
⭐ Merited by dkbit98 (2)

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MuSig2
A proof of concept
-----------------------------------------------------------------------------------------------------------------------------------------------------------------

What's MuSig2

It’s a multi-signature scheme for #Bitcoin based on Schnorr signatures.
Think of it as an upgrade to how multiple parties sign transactions — faster, lighter, and more private. 🔐

Unlike traditional multi-sig (e.g., m-of-n), MuSig2 lets multiple signers create one single aggregated signature.
On-chain, it looks like a regular signature. No one can tell it's multi-sig. 🤫

It’s non-interactive (after key setup), minimizes bandwidth, and is compatible with Taproot.
That’s a big deal for scaling, privacy, and efficiency.

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Advantages of MuSig2

MuSig2 has some serious benefits over classic multisig:

✅ Compact: One signature
✅ Private: Hides signer info
✅ Efficient: Fewer communication rounds

It works perfectly with Taproot, taking advantage of Bitcoin’s latest upgrade to enhance smart contract logic and privacy
Also: It reduces transaction fees—critical for apps, exchanges, and high-volume users.

Security + privacy + lower cost = a big win.
That’s MuSig2 in a nutshell. 🔐🚀

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Satochip — 1st smartcard wallet to support MuSig2

Satochip is breaking new ground:
It’s the first hardware smartcard wallet actively working on MuSig2 support.


Youtube link: https://youtu.be/KNhIsin0HdU

Why’s that big?

Smartcards have strict security and performance constraints. Supporting MuSig2 shows it’s not just a concept — it works even in highly secure, limited environments.
This unlocks secure multi-party signing on tamper-resistant cards — ideal for institutions, custody services, or even individuals who want maximum security.

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Let's talk integration

You are a mobile wallet dev? You build your own multi-sig application?
Let's talk and see how we can collaborate to bring you smartcards with MuSig support into your solutions.

👇

The implementation is available on our github:
* [Satochip firmware withMuSig2 support](https://github.com/Toporin/SatochipApplet/tree/musig2-support)
* [Satochip firmware diff with the new code](https://github.com/Toporin/SatochipApplet/compare/schnorr-support...musig2-support)
* [Pysatochip library & CLI with MuSig2 support](https://github.com/Toporin/pysatochip/tree/musig2-support)
* [Pysatochip library & CLI diff with the new code](https://github.com/Toporin/pysatochip/compare/satocash-support...musig2-support)


If you like it, please consider to support our proof-of-concept for the Bitcoin conf. hackathon: https://devpost.com/software/musig2-support-for-open-source-hardware-wallet-satochip
Like and Comment  Wink

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Contact

Telegram: https://t.me/Satochip
Twitter: https://twitter.com/satochip
Website: https://satochip.io
GitHub: https://github.com/Toporin
Youtube: https://www.youtube.com/channel/UCPmmfB5PpuwMtha9mbaRNlg
Post
Topic
Board Hardware wallets
Merits 1 from 1 user
Re: 🔥Satochip🔥 Hardware wallet on smartcard (USB/NFC) + Taproot/Nostr/Liquid
by
Tibu
on 15/05/2025, 13:38:33 UTC
⭐ Merited by dkbit98 (1)
The Keycard Shell is wonderful. Having a detachable secure element based on an affordable smartcard, usable with a screen, is genius.
I really like the project and hope it gets the recognition it deserves.
I am really interested to see how it is going to work, and I wonder if they Keycard Shell will be compatible with other cards (including Satochip).
I actually asked them that question with few others but I didn't receive any answer from them yet.
Maybe both of your companies can work together on some future project.

We had some dicussions with the Shell team. Currently seeing if we can have some synergies.
Def, it would be great to get Satochip compatible with the Shell device.
Post
Topic
Board Hardware wallets
Merits 1 from 1 user
Re: 🔥Seedkeeper🔥 Hardware device to backup your seedphrase - Meet the Ring™️
by
Tibu
on 15/05/2025, 13:37:18 UTC
⭐ Merited by dkbit98 (1)
You're absolutely right — we recommend using the Satochip-Utils tool (the software that manages all Satochip products, including the Seedkeeper) on a "cold" or offline computer, ideally with a bootable OS like TailsOS, for maximum security.

Regarding export options: our desktop and mobile apps have been intentionally kept simple to prioritize ease of use. However, the Seedkeeper supports many additional features accessible via the command line that aren’t exposed in the graphical interface.

Currently, the export function is only compatible with other Satochip™ products, as it relies on the device's Authentikey to securely encrypt and exchange sensitive data. That said, your suggestion about supporting encrypted backups compatible with wallets like Sparrow is very interesting and definitely worth exploring further.

As for the price: we’re doing our best to make the product as affordable as possible. The card reader is optional — any compatible reader from a local IT supplier should work. Additionally, we're actively looking for resellers in South America to help make the product more accessible in that region.

Thanks again for your valuable feedback!
I heavily use KeePass implementations like KeePass2 and Keepassxc as password managers. It would be interesting if the Seedkeeper card could optionally be integrated into Keepass.

Is there any documentation for more details about command line usage? For example, is there a way to export passwords so that we can optionally import them into another password manager?


That would be awsome to have such a Keypass integration. But it takes time and connection with their team - not that easy.
At least we could implement an import functionnalities that allow a user to import a .kdbx file into a Seedkeeper. But here again, as the memory size of a Seedkeeper is limited, it can be a mess to select what to import. Anyway, we are thinking about it for the next software release.

As for the command line info, you'll find your way here: https://github.com/Toporin/Seedkeeper-Tool

Post
Topic
Board Hardware wallets
Re: 🔥Satochip🔥 Hardware wallet on smartcard (USB/NFC) + Taproot/Nostr/Liquid
by
Tibu
on 10/05/2025, 13:12:58 UTC
Too many requests for a card with nothing on it. No logos, no hints — just pure privacy. 🕵️‍♂️
So here it is…
This is great as stealthy hardware wallet, but I guess we could achieve similar results with blank cards and loading Satochip code ourselves Wink

Another option for people who don't want to spend more money if they already have Satochip card is to buy dark color card stickers and stick them on their cards.

PS
Tibu, what is your opinion about new Keycard Shell hardware wallet?

Am I imagining things or what?  Didn't there used to be a whole bunch of Satochip designs available not too long ago?  Assuming I'm not going out of my mind, what happened to them all?
This were Special Edition cards only.
If there is enough interest from people Satochip can make them again.


The Keycard Shell is wonderful. Having a detachable secure element based on an affordable smartcard, usable with a screen, is genius.
I really like the project and hope it gets the recognition it deserves.

Post
Topic
Board Hardware wallets
Re: 🔥Satochip🔥 Hardware wallet on smart card (USB/NFC)
by
Tibu
on 10/05/2025, 13:10:48 UTC
It's obvious and easy to see differences and compare all products on their website, but they only looking similar from the outside.
In short, Satochip is a hardware wallet for making transactions, and Satodime is more like physical bitcoin aka the bearer cold storage.
https://satochip.io/compare/


Yes, I saw this comparison. The difference is only in the use value.
The hardware differences interest me. As far as I can see, both solutions use the same EAL6-certified secure element, so it seems it's just a matter of software.

In terms of hardware, there is no difference. Each product uses the same J3Rxxx smart card equipped with an EAL6+ certified chip (SE).

Satochip is a signing device, which means that it can sign a transaction using the unique private key stored inside its SE.
Satodime is not a signing device. It can generate a Bitcoin key pair (up to 3) inside its SE and will only reveal the private key if requested by the bearer. If you want te retreive the Bitcoin from a Satodime, you'll have to unseal the keyslot and sweep the private key in your existing wallet.

Same hardware - different products - different use cases.

First off, cool project. I definitely want to try this out.

I'm curious - what is the exact model of the cards, j3r110, j3r150, j3r180? Do you mind disclosing where you get them from? The reason I ask is, I've been looking at these for a couple of days and find the whole smart card landscape quite confusing. As far as I can tell, the j3xxx cards use NXP P71D321 chip/secure element. However, are the cards themselves manufactured by NXP? They're sold as such by some sellers (e.g. Cardlogix) but I can't find a single mention of these cards on NXP's website. So I'm a little worried about the source - is there a way to make sure the hardware is actually genuine?




Currently, we are using J3R180 smartcard from NXP. We cannot disclose our supply chain for many good reasons. And yes, the smartcard ecosystem is a real jungle. Too many products, too many vendors, not that much quality in the product sold. It's quite complex to navigate in this field.
As for the "genuine" check, each card is signed with our certificate and you can check the authenticity of the card by yourself using our PKI.

Use the dedicated application (mobile or desktop), go to the setting and you should find a button to check the card authenticity.


Post
Topic
Board Hardware wallets
Merits 1 from 1 user
Re: 🔥Seedkeeper🔥 Hardware device to backup your seedphrase - Meet the Ring™️
by
Tibu
on 10/05/2025, 13:07:29 UTC
⭐ Merited by dkbit98 (1)
- is affordable;
I wouldn't really say that Seedkeeper Ring is very affordable with current price.
There are many similar rings with NFC support that are much cheaper in China, but I guess Seedkeeper Ring have advantage of secure element.
Can you tell us what model of secure element is used in this product? And how many seedphrases we can store in one Ring?

PS
It would be good to have alternative silver color ring.


Well... — the Seedkeeper Ring isn't priced like standard NFC rings you might find for $20 on Alibaba, but it's also not a typical NFC product.
It integrates the same secure element as the Seedkeeper smartcard, offering a much higher level of security.

We're using the NXP J3R180 secure chip, which is specifically designed for secure applications.

As for storage: the number of seed phrases you can store depends on their length and the structure of your backups, but typically you can store multiple (20-40) seed phrases securely in a single ring.

Thanks for the suggestion about a silver color variant — we'll definitely consider adding that to the webshop in the future.
Post
Topic
Board Hardware wallets
Re: 🔥Seedkeeper🔥 Hardware device to backup your seedphrase - Meet the Ring™️
by
Tibu
on 10/05/2025, 13:04:19 UTC
I have some feedback to share,but to avoid getting lost, I'll focus on just one for now:

I noticed that when generating the seed on the Seedkeeper, it's displayed through the Satoship app's graphical interface. This could be problematic since it's generated on the user's online computer, which might be compromised by malware or keyloggers. Of course, this risk could be mitigated if the user generates the seed phrase using an offline computer.

I see it's possible to export the encrypted seed (E2EE), but from what I understand, these backups can only be used with another Seedkeeper or Satochip. I wish there was an option to export encrypted backups (as text or file) that could be imported into other software wallets like Sparrow, reducing dependency on a single product.

In a way, I found the product very interesting and would like to acquire it one day as additional options for my backups. However, the price of €25 plus the €19.99 reader makes it unviable for users in South American countries, where local currencies are much weaker compared to the dollar and EUR.

My apologies if I've misunderstood anything.



You're absolutely right — we recommend using the Satochip-Utils tool (the software that manages all Satochip products, including the Seedkeeper) on a "cold" or offline computer, ideally with a bootable OS like TailsOS, for maximum security.

Regarding export options: our desktop and mobile apps have been intentionally kept simple to prioritize ease of use. However, the Seedkeeper supports many additional features accessible via the command line that aren’t exposed in the graphical interface.

Currently, the export function is only compatible with other Satochip™ products, as it relies on the device's Authentikey to securely encrypt and exchange sensitive data. That said, your suggestion about supporting encrypted backups compatible with wallets like Sparrow is very interesting and definitely worth exploring further.

As for the price: we’re doing our best to make the product as affordable as possible. The card reader is optional — any compatible reader from a local IT supplier should work. Additionally, we're actively looking for resellers in South America to help make the product more accessible in that region.

Thanks again for your valuable feedback!

Post
Topic
Board Hardware wallets
Re: The Seedkeeper™️Ring
by
Tibu
on 30/04/2025, 12:16:43 UTC
Official thread: https://bitcointalk.org/index.php?topic=5397867.msg65330536#msg65330536

Feel free to ask your questions there if I've not answered them here  Cheesy
Post
Topic
Board Hardware wallets
Merits 1 from 1 user
Re: 🔥Seedkeeper🔥 Hardware device to backup your seedphrase - Meet the Ring™️
by
Tibu
on 30/04/2025, 12:15:59 UTC
⭐ Merited by dkbit98 (1)

-----------------------------------------------------------------------------------------------------------------------------------------------------------------
Seedkeeper - The Ring
Finally the perfect hardware device for your seeds
-----------------------------------------------------------------------------------------------------------------------------------------------------------------





Preambule

💍 Say hello to The Ring — the most elegant way to store your seedphrase.

If you’re serious about self-custody and protecting your Bitcoin, you need to see this.

Let’s break it down 👇




------------------------------------------------------------------------------------------------------


What's the Seedkeeper Ring? 💍

It’s a sleek, NFC smartring designed to safeguard your seedphrase for decades — even centuries. Dustproof, waterproof. Tamper-resistant.

A cold storage for your seedphrases.



------------------------------------------------------------------------------------------------------


Advantages

Seedkeeper:
- is protected by a PIN code (up to 16 chars);
- is affordable;
- is NFC ready;
- can support several seedphrases and other secrets;
- is trustless;
- is open-source.


------------------------------------------------------------------------------------------------------


Why does this matter?

Your 12- or 24-word seed phrase is the key to your crypto kingdom. Lose it, and everything’s gone.

Write it on paper? Risky.
Cloud storage? Dangerous.
Metal engraving? Smart — but most solutions are clunky or ugly.


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More than security — it’s peace of mind.


🧠 You don’t want to remember where you saved your phrase in 10 years. You want to know.
📦 And you don’t want it sitting in some random drawer or duct-taped under your desk.

This is legacy-grade protection.





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The real kicker?


It’s fu**** easy. Just tap your ring on your phone to import your secrets in the EAL6+ secure element. No drills, no hammers, no mess.
Get ready in minutes — but it’ll last you a lifetime.

And yes, it looks 🔥.

Minimalist. Discreet. Solid.
This isn’t just seed phrase protection — it’s a statement: you’re here for the long haul. 🚀

Whether you’re storing:
🔐 a 24-words #Ethereum seedphrase
🪙 your #Bitcoin wallet descriptor
💳 a Ledger/Trezor passphrases
🌱 Or even raw datas

The Ring is how you future-proof your digital wealth.

You can grab your Seedkeeper Ring now at https://seedkeeper.io/product/ring/


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Contact

Telegram: https://t.me/Satochip
Twitter: https://twitter.com/satochip
Website: https://satochip.io
GitHub: https://github.com/Toporin
Youtube: https://www.youtube.com/channel/UCPmmfB5PpuwMtha9mbaRNlg



Post
Topic
Board Hardware wallets
Merits 1 from 1 user
Re: The Seedkeeper™️Ring
by
Tibu
on 30/04/2025, 12:00:10 UTC
⭐ Merited by dkbit98 (1)
Quote
If they go that route you would  basically have to bite the POS terminal to pay with a tooth-implanted crypto chip.  Grin

Personally I find the idea of such  crypto wallets in the ring format pretty impractical. They're easy to lose and a bit of a hassle to use in everyday situations. In addition  wearing such ring-wallet in public could make you a target. Criminals looking to snatch crypto might consider  you as their next potential victim at  kidnapping  attempts.


Just to be clear, Seedkeeper is not a signing device thus not a hardware wallet.
It's designed to store your seedphrases, Bitcoin wallet descriptors and other credentials safely in a secure element.

Seedkeeper comes with a 100% open-source desktop and mobile app to unleash it's full power:
- generate strong password like a pro
- manage your most valuable credentials (login, passwords, URL...)
- generate and store your BIP39 compatible seedphrases
- import and export your wallet descriptors for an optimal wallet management.

Now in a Ring form factor to always have your secrets with you.

Quote
In addition  wearing such ring-wallet in public could make you a target.

I doubt anyone will ever know this ring is a "security" device. It does the opposite: it avoids attention completely. It looks like nothing. No markings, no logos, no color pop. Just a plain, unassuming ring.
That’s exactly the point: obscurity through minimalism, not theatrics.


Post
Topic
Board Hardware wallets
Merits 2 from 2 users
Re: 🔥Satochip🔥 Hardware wallet on smartcard (USB/NFC) + Taproot/Nostr/Liquid
by
Tibu
on 30/04/2025, 11:54:27 UTC
⭐ Merited by dkbit98 (1) ,examplens (1)
We’ve heard you. 📣

Too many requests for a card with nothing on it. No logos, no hints — just pure privacy. 🕵️‍♂️
So here it is…



Introducing the Opsec Edition card:
🖤 Ultra-minimal design
🕳️ No branding, no labels, no giveaways
🔒 Built for those who take privacy seriously
👉 https://satochip.io/product/opsec-edition/

This card doesn’t talk — it just works.
Same secure chip, same rock-solid hardware wallet.
But now in a stealth form factor. Perfect for your cold storage, vault, or go-bag.



And yes — you choose what you want preloaded:
✅ Satochip
✅ Satodime
✅ Seedsigner compatible
✅ Or blank - for DIY projects

If privacy is your priority, the Opsec Edition is made for you.
Silent. Secure. Sovereign. 🛡️
Get yours: https://satochip.io/product/opsec-edition/


Post
Topic
Board Hardware wallets
Re: [ANN] Keycard Shell – Open-Source, Multi-Card Hardware Wallet
by
Tibu
on 30/04/2025, 10:41:46 UTC
There are some big players already present on the market such as Tangem (only contactless) or Satochip (dual-interface).
Do you plan to open your "shell" to other smartcard player for a better interroperability?

By the way, nice job guys!

Post
Topic
Board Hardware wallets
Merits 1 from 1 user
Re: 🔥Satodime🔥 NFC bearer cold wallet with mobile app + On-ramp
by
Tibu
on 10/04/2025, 10:00:55 UTC
⭐ Merited by dkbit98 (1)
No lengthy KYC procedure
That means there is verification procedure for each transaction using Paybis service.
I visited their website and I can confirm that, instant verification is still a verification and you need to send them personal documents.
I prefer using no-kyc option when possible.
                        

I'm not talking about their website's widget... But the one integrated into Satodime mobile app and the recent Satochip-Utils release.
Check this out... No document required. Just a mail address.

Have a try. I'm sure you already have some Satodime laying around.

Using the mobile app:
https://satochip.io/setup-use-satodime-on-mobile/

Or the desktop app:
https://satochip.io/how-to-use-satodime-on-desktop/
Post
Topic
Board Hardware wallets
Merits 3 from 1 user
Re: 🔥Satochip🔥 Hardware wallet on smartcard (USB/NFC) + Taproot/Nostr news
by
Tibu
on 10/04/2025, 09:58:25 UTC
⭐ Merited by dkbit98 (3)
Ever heard of Confidential Transactions? 🕵️‍♂️💸

That’s the magic behind the Liquid Network, a Bitcoin sidechain that keeps your transaction details — like amounts & asset types — completely hidden from prying eyes.

But how does it work? 🤔

Enter blinding: a clever cryptographic trick that hides your data from everyone except the sender and receiver, while still letting the network verify the transaction is legit. Mind. Blown. 🤯
Now here’s where it gets spicy:
In the Satochip applet, we’ve just added support for Liquid’s confidential transactions — including a command to export your Master Blinding Key.

That means wallets can now reveal your confidential TXs (with your consent) and sign them securely via Satochip. 🛡️✨

This is already live on our beta branch 👇
🧪 Applet: https://github.com/Toporin/SatochipApplet/tree/schnorr-support
🔧 Green Wallet integration: https://github.com/Toporin/green_android/tree/satochip-support


What do you think?


Is confidential-by-default the future of Bitcoin privacy? Or just a niche power-user tool?
Let’s discuss. 🔥👇
Post
Topic
Board Hardware wallets
Merits 1 from 1 user
Re: 🔥Satochip🔥 Hardware wallet on smart card (USB/NFC)
by
Tibu
on 26/02/2025, 11:26:52 UTC
⭐ Merited by dkbit98 (1)
Tech team is on fire 🔥


Firmware info

The Satcohip v0.14-0.2 with Schnorr support for Taproot & Nostr is out.

🔊 Compared to v0.12, v0.14 adds the following functionalities:

  • Schnorr signature support for Taproot (to be used with Sparrow Wallet);
  • Schnorr signature support for Nostr (no key tweaking).
   
Source: https://github.com/Toporin/SatochipApplet/releases/tag/v0.14-0.2


Join the beta test

Want to try? Join the beta testers by ordering a DIY compatible smartcard and enjoy a -25% discount!

The  smartcard will come with the pre-loaded Satochip v0.14-0.2 applet with Taproot & Nostr support - AND - the default loading keys.

Perfect to build your next Nostr signing device.




Info

Order here: https://satochip.io/product/card-for-diy-project/
Coupon code: Nostr-25%

Readme: https://github.com/Toporin/pysatochip/blob/master/README-CLI.md

Some basic commands are:

- Import a private key on slot #0:
Code:
python3 satochip_cli.py --verbose satochip-import-privkey --keyslot 0 --privkey aabbccddeeff00112233445566778899aabbccddeeff00112233445566778899

- Get the corresponding public key:
Code:
python3 satochip_cli.py --verbose satochip-get-pubkey-from-keyslot --keyslot 0

- Sign Nostr event:
Code:
python3 satochip_cli.py --verbose satochip-sign-nostr-event --keyslot 0 --message "Hello, world" --kind 1 --broadcast


Submit your feedbacks on Telegram: https://t.me/Satochip

🙏 Thank you 🙏
Post
Topic
Board Hardware wallets
Re: 🔥Satochip🔥 Hardware wallet on smart card (USB/NFC)
by
Tibu
on 26/02/2025, 11:17:22 UTC
A few days ago, my Satochip wallet arrived, so let me mention it here too.  Smiley
Connected with Sparrow and Electrum—so far, it seems to be exactly what I was looking for.
I also tested it on a very old smart card reader, and there were no problems either. It would be good if Electrum had native support for the Satochip plugin in some future updates.



Sweet, thank you for the mention!

I also read your questions about the custom design. We are working on something not "crypto-related". Stay tuned.

Have a wonderful day!
Post
Topic
Board Hardware wallets
Re: 🔥Satochip🔥 Hardware wallet on smart card (USB/NFC)
by
Tibu
on 24/01/2025, 14:37:11 UTC
In terms of hardware, there is no difference. Each product uses the same J3Rxxx smart card equipped with an EAL6+ certified chip (SE).

Satochip is a signing device, which means that it can sign a transaction using the unique private key stored inside its SE.
Satodime is not a signing device. It can generate a Bitcoin key pair (up to 3) inside its SE and will only reveal the private key if requested by the bearer. If you want te retreive the Bitcoin from a Satodime, you'll have to unseal the keyslot and sweep the private key in your existing wallet.

Same hardware - different products - different use cases.
It's over now, I bought a Satochip, and I'm waiting for delivery in the next few days.  Wink
It seemed to me to be a better choice for a long-term hold, and I also like the possibility of supporting several other altcoins. I wish to have such an option in the coming years.
Once I get it, I'll write my impressions.

Yes, you're right. For long-term holdings and security, it's best to use a device that you can easily back up. Satochip can be backed up using the seed phrase, but Satodime cannot.

Personally, I would use Satodime for long-term storage, but only for a smaller amount of Bitcoin—something like $250 worth. You can think of Satodime as being like 20-franc gold coins. It’s easier to carry than a 1kg gold bar and more liquid since you can sell just a few coins.

In short, Satodime does the job as a “Bitcoin dime.”

Thanks for your purchase!