Collaborate Disseminate
Starting from a known nonce, AES GCM uses a counter to sequentially generate new numbers that are the input to the encryption function. If by chance two nonces from two distinct runs of AES GCM were close enough together such that their co… Continue reading In AES GCM, would using different nonces that are close reveal data?
I’m not a security expert, so please excuse this question if it’s silly, but I would really like an answer. I am using AES GCM to encrypt and would like to combine the randomly generated nonce with the ciphertext for convenience.
What’s an… Continue reading What’s a good way to append a nonce to ciphertext in Python for AES GCM in Python?
I remember about 90% of my password used for encrypting the persistent user data file system (stored as knoppix-data.aes) while setting up Knoppix a few years ago and would now like to explore the feasibility of a dictionary brute-force at… Continue reading Any information on the encrypted Knoppix user data file system (knoppix-data.aes)?
I would like to encrypt many files using symmetric encryption such as AES256, using a single memorised password.
I was planning to use gpg but gpg symmetric encryption does not work with –multifile flag. gpg has the ability to cache the p… Continue reading Best way to symmetrically encrypt multiple files using a password
What size of initialization vector (IV) is needed for AES encryption? I am using either CCM or GCM modes.
–> for GCM I saw online it’s 12 bytes please correct me
–> I couldn’t find what is it for CCM
In the QUIC spec, they’ve provided an example of header protection:
https://datatracker.ietf.org/doc/html/rfc9001#name-sample-packet-protection
They’ve got the following process (paraphrasing):
hp = c206b8d9b9f0f37644430b490eeaa314
sample … Continue reading Is the example in the QUIC spec for header encryption wrong, or have I missed something?
Will using the AES-GCM key as AEAD associated data potentially weaken the security or bring any adverse impact?
Before this question, perhaps I should ask, can an attacker extract AEAD associated data from the ciphertext without first decr… Continue reading Impact of using the AES-GCM key as AEAD associated data
I need to implement end to end encryption between front (reactjs) and back (laravel). What I try to do is encrypt data in front using package cryptojs, send it using axios to backend, in the backend I try to decrypt data using built-in fun… Continue reading Implementing end to end encryption (react js , laravel) [migrated]
Due to there are large encrypted files we are dealing with, we can’t afford to keep entire file in memory during a decryption process.
I’ve implemented the algorithm of chunked decryption of AES GSM encrypted file.
const (
tagSizeInByt… Continue reading How to verify authentication tag during chunked AES-GSM-128 decryption
This is really neat demo of the security problems arising from reusing nonces with a symmetric cipher in GCM mode.
Continue reading Demo of AES GCM Misuse Problems