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Safe to store public key encrypted private key?
I am implementing an anonymous credential system following Lysyanskaya, 2002, specifically much of chapter 3. We assume that the user (not anonymous) U has a user public key PK^(U) (I will try to do my best without LaTeX support here re: notation) and user private key, SK^(U.) When creating the …
The quantum computing revolution nobody is talking about.....
This is probably more significant than any of these papers coming out of China claiming to break RSA or Gift 64 using a western quantum computer. Scott Aaronson, the consummate quantum pessimist has rather abruptly changed his mind. The man who is famous for debunking claims related to quantum capabilities …
Chinese quantum D-Wave news is a repeat from 2023??
How to Read Cryptography Papers?
Does ChatGPT help in understanding cryptography papers? What should I do when I encounter concepts I'm not familiar with when reading papers? What are the most efficient ways to approach research? A lot of topics sound like gibberish, I am also struggling to understand certain mathematical concepts. Any advice?
Infinite inputs and Collisions with SHA256
Hi, Given SHA256 is supposed to be random and well distributed, is it true to say that essentially each output can have an infinite and relatively equal number of collisions generated by infinite inputs. i.e. given in reality we have infinite inputs to feed the function (think arbitrary long binary …
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 …