Posts
Calculating the RSA decryption key
I read where, having already determined the encryption component "e" the decryption component "d" is calculated as below... d ≡ e\^(-1) (mod φ) But any integer raised to the power of -1 is less than one. 5\^-1 = 1/5. And that's not an integer value. It's between 1 and 0. …
Floor division in RSA key generation?
Greetings all! This is my very first post. I'm working to add RSA to a data encryption system which I am authoring in Forth. This as a retirement hobby project. When finished I will put it into the public domain. Please kindly affirm or correct my understanding with respect to …
The Why of PGP Authentication
6 years after too much crypto
Built a simple file encryption tool after getting frustrated with complex options - Feedback wanted
**TL;DR:** Work in healthcare, needed to encrypt patient files easily before sending via email, or just stored . Existing tools were either too complex or enterprise-only. Built something simpler using the same encryption as Signal/WhatsApp. --- **The Problem:** I recurrently spent ages trying to encrypt any file. The process ends …
How we avoided side-channels in our new post-quantum Go cryptography libraries
The X Chat Protocol Reverse-Engineered
Can Elon Musk read your messages on X Chat? I’ve reverse-engineered the X Android app to find out whether it is as secure as claimed. Spoiler: It's not
Passwordless Authentication
Id like to introduce passwordless auth into my app and id like to get your thoughts on the approach. im aware this isnt a UX-related sub, but i think it factors in on the decision. In my app i have a need for a password. i can use it to …
Argon2ID parameters for the paranoid
Hello everybody I've created this protocol, which utilizes Socialist Millionaire Problem for authentication Now, in SMP, a user sets a question, and an answer. The answer is human-language, and most often weak. In my protocol, I calculate proof using Argon2Id with "extreme" parameters of 1 GB of memory, and 25 …
What are your stance on non-NIST standardized algorithms ?
Hi all, I want to ask the experts on here, what is your stance on algorithms not standardized / approved by NIST. For instance, chacha20poly1305, argon2id specifically. Obviously searching online deems them safe, and widely deployed. Even some winning awards, and some have papers analysing them. However, I am looking …