CISSP-ISSAP: Information Systems Security Architecture Professional

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QuestionQ31

VerifiedInfrastructure and System Security

Which of the following encryption modes has the property of allowing many error-correcting codes to operate normally even when they are applied before encryption?

Explanation

OFB behaves like a synchronous stream mode: a corrupted ciphertext bit affects only the matching plaintext bit after decryption, without causing error propagation into later data. Error-correcting codes can therefore correct such localized errors when they were applied before encryption.

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