Do you have a link to the public bitcoin script?

Currently, when you receive a note, there is no guarantee that it is not empty - and even if it is verified after you receive it. If the trace has been erased in a manner that is not obvious, once the issuer signs, you're out of luck. It could still be spent before you try to redeem it. The design doesn't need to be changed at all, but the security before and after circulation should be beefed up, as I suggested in my previous post. The more that issuance and redemption restrictions are automated, the better. It doesn't matter who the issuing (or de-issuing) party is, as long as notes are guaranteed to contain the funds while in circulation.

To my knowledge, both of these products are sold empty. The problem with openly selling preloaded btc notes in the United States is that the seller must comply with onerous federal regulations severely resticting money transmitters. Originating the notes in countries such as El Salvador and the Central African Republic, on the other hand, will make it possible to prevent the circulation of unbacked notes - which do not require special verification.

CBDCS (central bank digital currencies) are the worst possible use of blockchain, and where the world is currently headed. National banks will attempt to preserve their ability to arbitrarily print unbacked notes (debase currencies) at will. But worse than reducing their value while artificially funding their tyrannical pogroms, they would love to be able to expire them. This is much different than the "expiration" of offline cash notes. Offline cash notes can empty the btc to any digital wallet throughout their lifetime, and, upon maturity, the holder of the note doesn't even require a second signatory to do so. CBDC notes, on the other hand, will not allow redemption in any form. They will literally expire. No backing.

As long as the notes are loaded with btc, their issuance is strictly limited to the supply of btc on the note. An escrow account or simple smart contract guarantees that the issuer doesn't circulate the notes before they are loaded, and prevents them from being circulable once they are redeemed. This would eliminate the need to frequently verify the note.

The ability to verify the note electronically is a second layer of security regarding the integrity of the note.

Regimes that claim to be friendly to bitcoin would still be subject to the smart contract, and could freely issue the note under those parameters. But bitcoin notes do not require any "government" in order to function. Their acceptance of bitcoin and especially bitcoin notes facilitates and speeds the inevitable bitcoinization of the world economy.

I have to say this here:

These notes have the potential to be usable as an offline currency, which implies that they do not need to be verified for every transaction. But this will require that they are not circulated (delivered) until loaded, and that they will need to be verifiably and irreversibly destroyed before they can be redeemed. I vote to extend the delivery date to allow enough time to create an escrow account or whatever is required to properly secure these notes in a trustless manner. The technology involved in the creation of the silicone locked nfc alone eclipses that which would be required to secure the note. The notes can still be collectable after the maturity date with a key rotation. I know that this may also involve legal counsel regarding currencies, but, at least in some countries, the red tape is not as sticky.

Am I wrong?

Now that I have discovered an exquisite counterfeit-resistant note that requires 2 signatures to be redeemed, I am interested in discussing ways to reduce the need to electronically verify the note to the point where anyone who receives the note will instantly know that it is valid. In this way it can be used like cash.

1) Before the note is circulated, it will need to be loaded so that no one inadvertently receives an empty note. In order to remove arbitrary trust, it will need to be guaranteed at face value by the issuer - probably via an escrow contract. A government entity with unlimited funds would be ideal.

2) When a bill is redeemed, it will need to be irreparably destroyed in order to eliminate circulation of the emptied note. This will also require an escrowed guarantee of some sort, preferably automated via oracle as well. A notary or other verifiable witness will likely be needed before the second signature is made.

Solidity?

Tapscript?

In order to correct any misconceptions about the security and integrity of Bitcoin Cash, and regarding its level of decentralization, I am providing a link to a detailed description. Please review this carefully before commenting:

https://offline.cash/pages/bitcoin-note-security-overview

A holder of bitcoin cash is not restricted from cashing in if he wants. No one is stopping him. Bitcoin cash simply allows the use of bitcoin offline. It is even environmentally friendly because offline transactions do not require electricity - which has been a big concern lately.

Your argument is extremely fuzzy, Are you saying that bitcoin notes won't work because you think that they are not easy for the visually impaired to use?

This topic (Offline Cash) has its own thread which includes links to a FAQ and detailed description:

https://bitcointalk.org/index.php?topic=5401680.0

Please check it out as these high tech notes get ready to be rolled out. I have been in communication with Cameron Robertson, the inventor. Very promising technology!

Even though "cheap" cellphones are more common than desktops and laptops, poverty inhibits Internet accessibility.

Well, that's kind of the point, isn't it? The purpose of the notes is to make bitcoin as easy to use as fiat without the likely abuse (debasement) by government officials which plagues fiat.

These notes have currency-grade anticounterfeiting technology. It would take at least an official North Korea style hack to duplicate. Unlikely.

The patented time lock technology assures that the funds will be available at maturity regardless of the number of people who hold the bill in the interim.

The bills can be verified at any point with the built-in chip.

I discovered a very interesting patented technology that is very much in line with the goal of having a physical form of bitcoin that is readily exchangeable without Internet access:

https://mandrillapp.com/track/click/30895797/www.offline.cash?p=eyJzIjoiUVdWcTV1dUtmVnBXLWtYY1daVlRHcHhJOHY0IiwidiI6MSwicCI6IntcInVcIjozMDg5NTc5NyxcInZcIjoxLFwidXJsXCI6XCJodHRwczpcXFwvXFxcL3d3dy5vZmZsaW5lLmNhc2hcXFwvI2J1eT91c2VyQ29kZT13d2psa2pzXCIsXCJpZFwiOlwiMDM5OWE1NzY2NzQ3NDFhNGJiZGVmNWFiOTNiYzYzODNcIixcInVybF9pZHNcIjpbXCJmNGFkOTM5YjBiMjE1OTQzZDUyMWNmNjU3Nzk5ZWYzYzQwYjY0Njg3XCJdfSJ9

If you can find any bug in this note, let me know. I will be investigating it in detail. It looks like a lot of thought has been put into this technology.

Adapt the keypair generator to a 3d printer that prints the private key QR inside and forgets it immediately as the card is printed. The public QR can be printed on the top (4th) layer along with an anti-counterfeiting device of some sort. The inner QR code can only be accessed once. Here is a basic thingiverse QR:

https://www.thingiverse.com/thing:46884

This would solve both the durability and privacy problems.

Putting this mechanism inside of a vending machine could open the possibility of selling BitCheques in the 3rd world - and elsewhere. It may even be patentable.

Anyone interested?

I would like to set up a guaranteed purchase mechanism for BitCheques (a sealed tradeable "paper" wallet) with a 2 of 3 multisig and, if necessary, an escrowed smart contract with the arbitration mechanism built in.

https://bitcointalk.org/index.php?topic=5399679.0

How can I set this up so that a secure guaranteed purchase can be made from my website? The BitCheques will come blank, and will be guaranteed and/or insured up to a certain amount and for a specified time period.

A plastic trifold card could be laser-etched and sealed automatically instead of printing on paper. A mini laser engraver can be purchased for a little more than $100:

https://m.geekbuying.com/item/DAJA-DJ6-Mini-Laser-Engraver--496695.html?Currency=USD&matchtype=e&device=m&msclkid=8b00561be227195b138c349484fd34a0&utm_source=bing&utm_medium=cpc&utm_campaign=Shopping%20US&utm_term=4575617652408320&utm_content=best%20seller&ref=w

The nfc chip can be added in a later edition.

Here's an interesting history of physical bit coin to November 2020:

https://bcmint.com/blogs/news/history-of-physical-bitcoin

All of these coins are preloaded.

CAR requires ham operators to be licensed:

https://www.qsl.net/oh2mcn/tl8.htm

Hopefully Sango will waive this for btc.