y₿ on Nostr: #nostr ...

#nostr 的中继站上以查验散列值代替验证笔记内容，这正是隡佗(satoshi)运用脉缂链(Merle tree)技术所倡导的“简验支付协议”(SPV,Simplified Payment Verification)方法。

#Bitcoin #SPV

quoting note15yw…57k8

Sketch of a protocol I discussed with jb55 (npub1xts…kk5s) for proving storage of a file.

before uploading, select 32 random bytes from the file, store their indices and the sha256 hash. do this 1000 more times (select 32 different random byes, calc sha256).

upload the file to the server. every day, ask for the hash of the 32 bytes at the indices stored from the server. if it matches transfer some sats. if not the server no longer has the file. you can check for 1000 days.