Q. The CTR algorithm for PRNG is known as

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Q. Which mode is recommend for the RFC 4086 Random number generator?

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Q. 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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Q. Which mode is less prone to decryption : PRNG using CTR / PRNG using OFB?

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Q. ANSI X9.17 uses a seed of size

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Q. How many 3DES blocks are present in the ANSI X9.17 PRNG?

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Q. How many DES encryptions take place in the ANSI X9.17 PRNG?

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Q. Which of the following PRNGs is used in most recent Intel Chips?

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Q. For the NIST CTR_DRBG , Seed length =

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Q. The CTR mode uses a Key K and an Initial Vector V. The Intel Digital Random Number generator has these values initially as

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Q. What is the Seed length (seedlen) length for AES-192 ?

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Q. What is the Seed length (seedlen) length for 3DES?

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Q. The Generate function precedes the Update phase in CTR_DRBG.

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Q. With reference to stream ciphers, the output of the generator is called

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Q. Which of the following is not a valid design parameter to be considered in designing stream ciphers?

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Q. Which mode is recommend for the NIST SP 800-90 Random number generator?

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Q. ANSI X9.17 uses which cryptographic algorithm?

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Q. Pretty Good Privacy(PGP) uses which PRNG?

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Q. Which of the following statements are true?

i) Stream Ciphers are fasters than Block Ciphers
ii) Block Ciphers can reuse keys
iii) Block ciphers use lesser code than stream ciphers

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Q. Which of the following statements are true?

i) RC4 is used in SSL/TLS
ii) File transfer, e-mail use stream ciphers
iii) Browser/Web Links use stream ciphers

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