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SAM9G46-Pt2-Slide8

Output Feedback is identical to CFB except that the previous output block is used as input in OFB mode where in CFB the previous cipher is used as input. The OFB mode features the iteration of the forward cipher on an initialization vector to generate a sequence of output blocks that are exclusive-ORed with the plaintext to produce the ciphertext, and vice versa.

PTM Published on: 2012-01-09