Subnostr

Bitcoin silent payments have been maturing, and there are already wallets that support it, such as https://app.silentium.dev.

Silent payments are a type of payment that can be made to a unique on-chain address for every payment, even though the receiver has provided the spender with a reusable (off-chain) address. This improves privacy.

Keychat's continual update of receiving addresses is somewhat similar to silent payments, with the goal of avoiding address reuse to enhance privacy protection. Both use ECDH, but the difference is that Keychat's update of receiving addresses is interactive, while silent payment is non-interactive; the recipient needs to scan all transactions to find those that belong to them. Interactive updates are more suitable for chat scenarios, while non-interactive updates are more suitable for transfer scenarios.

https://silentpayments.xyz

https://bitcoinops.org/en/topics/silent-payments/

https://gist.github.com/RubenSomsen/c43b79517e7cb701ebf77eec6dbb46b8#user-content-fn-2-28a8767a0e337d8ff2949d11121e27b4 nostr:note1mzmdvjzfud0nnz94t5f2r3cl4hh692ytvaeks2e754nf4rvxdamsuafzdn nostr:note18ef8r2naprhyv956syrjyaapc3pqngef7n6ax36ku7g8djfesltqhx6m8s

Freakoverse 1y ago

I looked into Silent Payments. It's neat.

I do have one thought where someone can sting you (ish) with this (if I understood it right):

(Let's assume I'm a jackass government mr.joe)

- I can send 0.12345678 BTC to a silent address

- Look up the same amount sent to get a public address that the receiver controls

- At this point, I can harass the receiver about that exact money.

- I could also wait and see if the receiver may combine all of their coins from all of their addresses into one and start questioning/harassing them about it, which may lead to confirming all of what they have received from the silent address. (The receiver may not do this, and if they do they can play dumb and say "I didn't want my money so I picked a random address and sent them money there").

- I'm not saying SP is bad, in fact, I think it's a great layer and I'd want to use it. I'm just sharing my thoughts/concerns.

#bitcoin

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Discussion

Freakoverse 1y ago

Now that I think about it, I think we'll get any better than this in regards to privacy on Bitcoin layer-0.

Looking forward to when all wallets support Silent Payment, assuming all the tech kinks get ironed out if there are any issues.

Imagine though, if SP + BIP that adds coinjoin (coordinatorless) to all transactions by default + auto random split output, man, that would actually be the final nail to have the best privacy on bitcoin and that would be the end of it.

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