Signature generation

0

I am trying to unwrap bitcoin transaction generation process.

A bit confused about signing part.

My understanding is the transaction is sha256'd, then sha256'd one more time, then ECDSA'd.

Based off https://en.wikipedia.org/wiki/Elliptic_Curve_Digital_Signature_Algorithm, ECDSA will first hash the message. Does that mean the transaction is sha256'd 3 times in total?

All the best!

Johnny

Johnny

Posted 2018-10-18T23:14:46.653

Reputation: 103

Answers

2

No, only two hashes. The hash itself isn't typically described as a part of ECDSA though the input must already be hashed (because e.g. a signature of 0 is trivially forged).

G. Maxwell

Posted 2018-10-18T23:14:46.653

Reputation: 6 039

Asked: 2018-10-18T23:14:46.653

Viewed: 63 times

Active: 2019-01-07T18:01:42.270