delvingbitcoin
OP_PAIRCOMMIT as a candidate for addition to LNhance
Posted on: October 25, 2024 19:11 UTC
The discussion revolves around the concept of applying a mini-hashing technique to modify how data is preprocessed for hashing, specifically in the context of redistributing bytes amongst stack elements to enhance the mutability of the preimage.
The focus is on whether replacing traditional static padding with a mini-hashing approach could offer benefits for this purpose.
The provided code snippet illustrates the "original" method for generating a hash using static padding. It employs a HashWriter
object initialized with a specific tag, followed by the serialization of two vector inputs along with their sizes and a predefined padding value before computing the SHA-256 hash of the combined data. The padding used here is defined as 0x01000000
in little-endian serialization, which is statically applied to each input vector's size within the hashing process.
This approach raises questions about its effectiveness and the potential advantages of introducing a dynamic mini-hashing mechanism that could alter the way data is prepared for hashing, possibly leading to improved security or efficiency in certain applications. The underlying implication is an inquiry into alternative methods for constructing preimages that might be more resilient or adaptable based on the specific requirements of the system or application in question.