Quote from: satscraper on Today at 11:26:06 AM

Quote from: walletbro on May 13, 2025, 06:16:07 AM

Quote from: satscraper on May 13, 2025, 05:48:27 AM

Quote from: walletbro on May 12, 2025, 03:57:16 AM

Quote from: satscraper on April 30, 2025, 12:04:54 PM

I have Tangem 2 and use it primarily to top up my crypto card while on the go. Because of that, I would have little interest in their "shell" accessory ^{which requires the wired connection}. One of the key advantages of Tangem is that it connects wirelessly via NFC to its dedicated mobile app ^{that is very convenient for mobile use}.

Shell can be used 100% air-gapped. No wired connection. You sign transactions by pointing Shell's camera to a wallet like UniSat, BlueWallet, ... etc. Then confirm on Shell's display & sign. Then let UniSat read the signature QR on Shell's display.

Fully air-gapped. Shell's usb port can 1) have data turned off 2) be used for charging only.

Keycard also works via NFC - with one open source EVM wallet - Status.im - for now.

Tangem offers the unique capability to function as the seedless wallet utilizing an innovative backup technique. Each card in the related set is capable of restoring sensitive information such as your key and PIN. As Zack Herbert ^{CEO of Foundation} mentioned in the recent interview, SEED phrases may soon be obsolete. Based on the information from your website, it appears that Keycard still relies on seed phrases. Is that correct?

Shell allows for backup cards, too.
You can create a couple ^{or more} backup cards and then destroy your paper backup.

The main difference to Tangem is that Keycard allows you to add backup cards after the initial setup.

Mind that Tangem doesn't have a "Shell", but you need to use their close-source app. Which had a security vulnerability where imported private keys could be leaked ^{but that's for another day}

I understand your point, but my main question was whether Keycard can operate in "seedless" mode. Based on your somewhat non-committal response I’m starting to think that it doesn't support this feature, and that generating SEED phrase is the only viable option for it. BTW, does Keycard shell support extending the standard BIP 39 phrase by adding the custom password/phrase ^{or it is strictly limited to the standard words from the BIP 39 word list}?

I think I understand. Do you mean SEEDLESS in the sense that no display ever shows the seed phrase?

No, the current Shell firmware version does display the seed. Technically, it's possible not to.
But the team likes to see demand for that SEEDLESS mode, mostly because it's a trade-off in security.

Also, you can always simply burn your seed paper after creating multiple backup cards, which makes it SEEDLESS in a sense. But I guess not 100% in the sense you would like to have it. Does that make sense?