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Feedback on this signature scheme?
So I made this signature scheme, it's the most bare bones version available. Anyone see any obvious holes in the core algorithm? It's python, so don't try are actually use it for anything. I do imagine it's quantum resilient, but I'm curious if it's classically resilient. Here's the repository. git@github.com:tart-grapes/dntl.git …
X25519 DH using a single key
What happens when an X25519 DH process is performed using a private key and the public key derived from it? I've tried to find any work on this question, and my Google-fu is coming up short. Is the resulting shared key particularly weak? Does it reveal anything about the private …
Reviving an Old Thread on Airgapping
Hello! I was wondering if anyone has utilized the relativity new/old rubber ducky tool by Hak5 on your airgapped machine and if it’s subtle or clonky. I was unimpressed by the video demonstrations…the reason I’m asking is I was curious as to the utility of putting an airgapped machine in …
Going from KEM to Signatures
Is there a known efficient way to generically convert a secure KEM into a signature scheme? I'm looking for a method that doesn't devolve to turning the KEM into an OWF and then building a hash based signature scheme. I am aware that you can use a secure KEM to …
What are the potential cryptographic applications of the Deligne-Lusztig theory being solved?
question about web crypto subtle ecdh shared secrets
hello everybody, is there any way to generate an ecdh key with javascript in a browser and with c on a backend? how are the common secrets calculated? im trying to get a edch shared secret in a browser and on a backend without using subtle on the backend itself? …
End-to-End Encrypted Cloud Storage in the Wild: A Broken Ecosystem
ML-DSA secret norms?
I was performing vivisection of an implementation of ML-DSA and noticed that the L2 norms of the secret vectors were longer than I had anticipated. My understanding (which could be incorrect) was that for a secret to be short enough it should fall within 0 ≤ |x|\_l2 ≤ B, where …
Thoughts and Opinions About SQIsign?
What are your thoughts and opinions about SQIsign, the post-quantum digital signature?