Information, Computer and Network Security Terms Glossary and Dictionary

OFB: Output Feedback

In cryptography, output feedback (OFB) is a mode of operation for a block cipher. It has some similarities to the ciphertext feedback mode in that it permits encryption of differing block sizes, but has the key difference that the output of the encryption block function is the feedback (instead of the ciphertext). The XOR (exclusive OR) value of each plaintext block is created independently of both the plaintext and ciphertext.

Related Terms

OFB: Output Feedback