Author

Topic: [RFC] Detecting Malled Transactions (Read 680 times)

legendary
Activity: 1708
Merit: 1020
February 13, 2014, 03:28:04 PM
#1
from https://gist.github.com/sipa/8907691
Quote
1. Inherent ECDSA signature malleability
2. Non-DER encoded ECDSA signatures
3.-8. [Txin script altering stuff]

Non-malled:
1.) Rule: lower half S is better
(does the standard client or any other client produce differing signatures?)
2.) Rule: only DER, handled as of 0.8+
3.-8.) Rule: shorter tx_in script is better

edit: How to find malled tx in the first place? Use NTXID: https://github.com/bitcoin/bitcoin/pull/3656
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