Remove pre-hashing for block and transaction signatures

#1

Dear Lisk community,

With this email I want to kickstart the discussion and gather your feedback regarding the LIP "Remove pre-hashing for block and transaction signatures". You can find a short summary of the LIP and link to the LIPS repository below.

Abstract

This LIP proposes to remove the hash-then-sign paradigm for block and transaction signatures in the Lisk protocol. That means, block or transaction data should be signed instead of the hash digest of block or transaction data. We elaborate on why this paradigm is typically used, and why it provides more disadvantages than advantages in the Lisk protocol, where Ed25519-SHA-512 is used.

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Andreas Kendziorra
Cryptographer, Lightcurve
andreas.kendziorra@lightcurve.io