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while (len(temp) < requested_number_of_bits) do V = E(Key, V) temp = temp || V The above algorithm is for the CTR mode.

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while (len(temp) < requested_number_of_bits) do

V = E(Key, V)

temp = temp || V

The above algorithm is for the CTR mode.

(a) True

(b) False. It is for the ECB mode

(c) False. It is for the OFB mode

(d) False. It is for the CFB mode

I got this question in an international level competition.

Question is taken from Pseudorandom Number Generators and Stream Ciphers in chapter Pseudorandom Number Generation and Stream Ciphers and More Block Ciphers of Cryptograph & Network Security

1 Answer

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Correct option is (c) False. It is for the OFB mode

Explanation: The algorithm above is the OFB mode representation.

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