What is encryption & code cracking?

Decryption: recovering the original data from scrambled data by using the secret key. Code cracking: uncovering the original data without knowing the secret, by using a variety of clever techniques. Whenever we consider a possible encryption technique, we need to think about all those aspects: how easy is it to encrypt? how easy is it to decrypt?

Did a security firm crack signal's encryption?

A security firm has gone public with claims that it cracked the encryption used by messaging app Signal, which is famed for the level of privacy afforded to its users. According to a blog post published by Israeli company Cellebrite, “decrypting messages and attachments sent with Signal has been all but impossible...until now”.

Can quantum computers crack existing encryption algorithms?

The cryptography to defeat them may already be here Quantum-resistant encryption research is a hot topic because it is felt that quantum computers are almost certain to become prevalent and sufficiently powerful to crack existing encryption algorithms.

Can a locked Android phone crack signal encryption?

The suggestion is that cracking Signal encryption on a locked Android device is another question entirely and conducting the test using an unlocked phone defeats the object, because messages would be accessible anyway.