Which type of encryption involves encrypting data using a combination of substitution and transposit

Which type of encryption involves encrypting data using a combination of substitution and transposition ciphers with a block cipher mode of operation that involves encrypting each plaintext block as a function of the previous ciphertext block?

Published: 30-Nov--0001

(a) Output feedback (OFB) mode

(b) Cipher feedback (CFB) mode

(c) Counter (CTR) mode

(d) Electronic codebook (ECB) mode

Answer: Cipher feedback (CFB) mode

| Subject : Technology | Chpater : Cryptography

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