Devnet 4#44
Merged
TomWambsgans merged 26 commits intomainfrom Apr 29, 2026
Merged
Conversation
b-wagn
reviewed
Apr 15, 2026
| /// | ||
| /// ### "Replacement" | ||
| /// This means we "replace" the rate elements of the state with the input chunk, instead | ||
| /// of adding (in the sense of finite field addition). |
Contributor
There was a problem hiding this comment.
similar to the other change: make explicit that this is no longer consistent with the paper, and explain why we do that.
Contributor
Author
There was a problem hiding this comment.
I have update the doc with:
Using a replacement-sponge is not consistent with [eprint 055](https://eprint.iacr.org/2025/055.pdf),
but keeps the same security level. Motivations of this change: zkVM friendliness (saving
roughly 1 cycle per element that we `replace` instead of `adding` it).
|
|
||
| ## Deviations from the [original paper](https://eprint.iacr.org/2025/055.pdf) | ||
|
|
||
| - use of 'overwrite' sponge, instead of 'addition' / 'xor' sponge. |
Contributor
There was a problem hiding this comment.
maybe make a bit more precise. Where exactly, and why?
Contributor
Author
There was a problem hiding this comment.
updated with:
use of 'overwrite' sponge, instead of 'addition' / 'xor' sponge, when hashing the WOTS pubkey. Motivation: zkVM friendliness (saving some cycles). Same security level.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Changes: