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Encryption is the process of transforming plaintext using a cipher into ciphertext to make it unreadable to anyone except those possessing the key. Decryption is the process of transforming that ciphertext back into plaintext, using the key.

0 votes
2 answers
130 views

Multiple IV CBC

CBC's encryption is not paralelizable but I could divide a 64 block message in 4 16 block parts and encrypt those 4 parts separatly in parallel using a diferent IV for each one. Is this unsecure ? …
4 votes
1 answer
302 views

Why AEAD instead of encrypting with a simple hash?

I hear a lot about AEAD encryption (GCM, EAX, ...). …