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Transactions in Stamp: Part 1 - Privacy

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Written by   280
1 month ago

Stamp (EDIT: getstamp.io it seems that the owner of read.cash has banned my domain.) is an upcoming wallet that is currently functioning on Bitcoin Cash testnet. It is an experimental project that will change the way people communicate by attaching a spendable value directly to messages - or messages to Bitcoin Cash transactions depending on your perspective. It uses a suite of protocols called CashWeb ( getstamp.io/whitepaper.pdf ).

When Stamp sends a Bitcoin Cash transaction, to another CashWeb wallet, it also attaches metadata that is relayed directly to the recipient. This allows your wallet to instruct your friend's wallet on how to spend that transaction.

Currently, the recipient of a transaction must first send you an address via email, or telegram, or some other messaging service. This puts all the terms of the contract in the recipients hands. It also means that the sender cannot generate a contract and give it to you like cash. Any metadata associated with the transaction must also be sent off-chain manually -- this could be, for example, an invoice, a receipt, or contract details.

There are two things that separate cash and digital (non-crypto) payments right now: the ability to push, rather than pull money; and doing that without a fee paid to a specific organization.

Someone cannot give you money without your consent, and the payment system's consent (and without your attention). Smart contracts cannot make unsolicited payments to Bitcoin Cash users right now because this control is in the hands of recipients.

By having an encrypted off-chain metadata also attached to every transaction, there is a mechanism to provide seamless integrations for standard contract types; and without any possible third party interference. (e.g. maybe you want to make a friendly binary contract with a friend over the price of BCH in a year from now.)

The first contract that has been written is one that sends a recipient a bundle of multiple transactions. This bundle includes instructions on how to generate spend keys for all of the outputs. It prevents any Stamp transaction from being associated with a public address, or a third party knowing how much money is being sent.

This also means that you can send a total amount to your intended recipient across multiple transactions. Because of this, a wallet never needs to re-combine any outputs - a recipient's wallet can understand that multiple Bitcoin transactions are being used as part of one transaction.

Because re-combining outputs leaks information to chainalysis programs and reveals associations which previously could not be inferred. Stamp, by obviating the need to recombine outputs, makes chainalysis lose a significant source of data. This means chainalysis becomes significantly less reliable for identifying co-party to all transactions.

This greatly improves Bitcoin Cash privacy and Stamp sends all transactions in this way.

Additionally, when sending multiple transactions as a group, most of these transactions will not require a change output. Imagine you want to send a friend 100000000 sats. But you have UTXOS of 43214230 sats, 34124312 sats, and 43224312 sats. Your wallet will send three transactions, one sending 43214015 sats, 43224097 sats, and a final one sending 13561888 sats to the recipient and 20562424 in change.

In the above example, 2 out of 3 transactions had no change. That is to say, the majority transactions will have one input, and one output.

Currently, Chainalysis is able to be almost entirely sure that any transaction that has one input, and one output, is still owned by the person who generated the transaction. They can do this because it is unlikely that an individual UTXO (Coin) that is exactly the right size for the amount they wish to send someone else - not so under the regime of Stamp-compatible wallets.

Under a future where people are using Stamp-compatible wallets, the majority of transactions will be 1x1 transactions. Which means that the majority of transactions transferring "ownership" of a UTXO will be 215 byte 1x1 transactions. Re-keying a UTXO becomes very likely a change of ownership. Previously, to generate uncertainty about UTXO ownership, you needed to generate at least a 1x2 transaction, and even then there was a 50% chance that an individual UTXO was owned by the sender. 1x1-transactions were almost always held by the same party.

This is extremely important, because almost all court cases hinge upon proving that a defendant made a specific financial transaction. Ultimately, Chainalysis data must be valid in a court of law. Their data cannot be accepted when the probabilities of association are too low.

If, in the future, there is no deductive basis for determining transaction ownership, Chainalysis data becomes worthless.

With Stamp-compatible wallets the majority, on the Bitcoin Cash network, it becomes possible to add uncertainty to the blockchain simply by moving coins around without requiring 3rd party liquidity. Moving UTXOs a few times generates anonymity similar to things like CoinJoin and CashShuffle, but without liquidity constraints.

This is only one of the benefits of allowing Bitcoin Cash transactions to have attached off-chain metadata. There are many others which I will discuss in coming articles.


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Written by   280
1 month ago
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Comments

Thanks for the information

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1 month ago

This is the answer

$ 0.00
1 month ago

So good stamp in a way deals bch

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1 month ago

This is indeed great. I'll love to use the stamp wallet

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1 month ago

I must say great innovative apart from privacy, specifically i like the idea about UTXO 1X1 transaction. Great innovation for the #BCH. Thanks a lot.

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1 month ago

Thanks for sharing this. My real happy come when I realized am in that generation to witness this come uping welcome development. But my main advice is, make stamp in a very simplify way that anyone specially the third world can at least handle or explain to one another.

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1 month ago

very nice

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1 month ago

I want to use it 😍😍😍thanks for this great Stamp wallet ❤️.

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1 month ago

Well, I am looking forward to used this wallet soon.

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1 month ago

Nice article

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1 month ago

This looks freaking awesome! It’s good to know that with all the drama in BCH some people are focused on Building! And those people get a lot of respect. Thank you Micropresident! You are one of BCHs MVP!

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1 month ago

Helpfull article

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1 month ago

Hey micropresident I am asking for help pls sponsor me and upvoye my article

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1 month ago

I mean upvote

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1 month ago

Cool dude..👍

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1 month ago

Woow this is very good! Thanks dear Sir 🍀🍀🍀

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1 month ago

Woww.. Nice one Dude!👏

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1 month ago

This is Awesome

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1 month ago

Very good article. Thanks for sharing.

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1 month ago

Very informative article thanks @micropresident

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1 month ago

Looking forward for this new app to be available in google play store.

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1 month ago

The wallet seems nice. Thanks for making us informed about this @micropresident. I will look forward for your coming articles about the others.

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1 month ago

Very well explained sir! Stamp is a game changer I guess. 🤔

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1 month ago

With all the demand issues about privacy, i think STAMP would be a perfect example, this is awaited and been longed to have gone mainstream. Thanks for the consistent effort and had work @micropresident can't wait for more interesting articles about STAMP.

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1 month ago

This is awesome man. Stamp is the killer app for BCH.

$ 1.00
1 month ago

Nice article

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1 month ago

Thanks for your article and it informative and important for us.thanks again........

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1 month ago

Wow!!New wallet,,,

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1 month ago

Excellent

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1 month ago

Wow very good topic. Thank dear sir..

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1 month ago

this topic is nice and article also thanks for sharing this sir

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1 month ago

Hey, there's a bad link on both links.

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1 month ago

This is Amazing

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1 month ago

Good and informative article bro. You are one of the great writters. Keep it up bro. In future you will better than previous ☺☺ Thanks for sharing such an informative article.

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1 month ago

Privacy issues to be resolve once this will be out 💝👍

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1 month ago

Excellent

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1 month ago

Solid Subscriber here! Dude can you Subscribe me also? 😇😇

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1 month ago