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What is the maximum size of the key in blowfish algorithm?

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What is the maximum size of the key in blowfish algorithm?

(a) 256 bits

(b) 512 bits

(c) 56 bytes

(d) 48 bytes

I had been asked this question in an interview.

I'd like to ask this question from Blowfish Algorithm in chapter Pseudorandom Number Generation and Stream Ciphers and More Block Ciphers of Cryptograph & Network Security

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Right answer is (c) 56 bytes

The explanation: The maximum size of the key in blowfish algorithm is 56 bytes or 448 bits.

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