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by norcimo5 3277 days ago
What are the advantages of GCM over CBC? And whats wrong with AES256?
2 comments
snakeanus 3276 days ago
- GCM unlike CBC is an AEAD mode (has a MAC build-in)

- CBC needs padding, which when misused can lead to padding oracle attacks

- GCM allows for parallel encryption

> And whats wrong with AES256?

There are more modern, faster and better ciphers that are designed to not be vulnerable against many side-channel attacks that AES is difficult to protect against.

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kaoD 3276 days ago
GCM has an integrity check built in, which is very useful in crypto.

https://crypto.stackexchange.com/questions/2310/what-is-the-...

https://crypto.stackexchange.com/questions/14747/gcm-vs-ctrh...

https://security.stackexchange.com/questions/33569/why-do-yo...

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