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The blowfish algorithm’s key expansion converts a key of at most 448 bits into several subkey arrays totaling ___ bytes.

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The blowfish algorithm’s key expansion converts a key of at most 448 bits into several subkey arrays totaling ___ bytes.

(a) 4096

(b) 4608

(c) 4168

(d) 4864

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Question is taken from Overview topic in division Cryptography Overview, TCP/IP and Communication Networks of Cryptograph & Network Security

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Right choice is (c) 4168

Best explanation: Key expansion converts a key of at most 448 bits into several sub key arrays totaling 4168 bytes i.e. eighteen 32-bit sub keys + four 8×32-bit s boxes = 4168.

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