sipa changed the topic of #bitcoin-wizards to: This channel is for discussing theoretical ideas with regard to cryptocurrencies, not about short-term Bitcoin development | http://bitcoin.ninja/ | This channel is logged. | For logs and more information, visit http://bitcoin.ninja
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<Jmabsd>
a "DER encoded signature with sighash byte for contract endorsement" can be as small as 9 bytes??
<Jmabsd>
i thought normally they're 72 or 73B. (73 is the max.)
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<sipa>
Jmabsd: DER is variable length
<sipa>
if the r and s value in the signature are small enough, the encoding becomes shorter
<Jmabsd>
sipa: right. but like, in what situation would you get a <72B endorsement?
<Jmabsd>
when could they become, how is this a function of privkey (or pubkey for that sake)?
<sipa>
< sipa> if the r and s value in the signature are small enough
<sipa>
obviously this can't depend on the private key
<sipa>
otherwise the signature would leak information
<Jmabsd>
sipa: ahh, the r/s value is the signature's "nonce" input/argument?
<Jmabsd>
are there any notable amounts of <72B signatures on the chain?
<sipa>
Jmabsd: no, the nonce is secret
<Jmabsd>
sipa: in normal SECP256K1 signing the r/s value comes from what
<Jmabsd>
didn't study its workings.
<sipa>
Jmabsd: then all you need to know is that randomly the signature will be occasionally shorter
<sipa>
Jmabsd: and pathologically constructed ones can be as small as 9 bytes
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