I've tried searching this answer on here and on google, but I cant seem to find a succinct answer (maybe because its obvious).
My understanding from wiki/tutorialspoint/ppt is that for CBC/CFB, decryption parallelizable means a plaintext block can be recovered from two adjacent ciphertext block. Is this correct or is there more? I really don't see how the word parallel fits into this at all.
It is stated as advantage for the decryption to be parallelizable, but if an attacker has access to your ciphertext, then couldn't the attacker just decrypt it easily by using adjacent ciphertext blocks.
I've know about C threading, is this related to it? As in you can decrypt the from multiple threads. I don't see how this is possible either because it seems to be done from one chain.