I’ve been working through the byte-level details of bitcoin transactions and I need some help on DER-encoding.Continue readingQuestion on DER-encoding of signature pair (r, s)
Encryption functions, message digests, and elliptic curves powering bitcoin.
I’m trying to understand how does “recid” (Recovery ID) variable work in libspec256k1 library (with C language).Continue readingHow does “recid” variable work in libspec256k1 library?
Using secp256k1 endomorphism
The existence of the endomorphism is a roughly 20% speedup in a plain multi-exp due to halving the number of doublings.Continue readingUsing secp256k1 endomorphism
Encrypting messages question
It isn’t the same with signing/verifying that you prove you own the address.Continue readingEncrypting messages question
I am writing transactions manually and have stumbled across a rather bizarre situation.Continue readingBitcoind does not like ECDSA (r, s) pair produced by OpenSSL