Which of the following is a stream cipher?
A. DES
B. Skipjack
C. RC4
D. Twofish
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Which of the following is a stream cipher? A. DES B. Skipjack C. RC4 D. Twofish
Implement the RC4 stream cipher in C++. User should be able to enter any key that is 5 bytes to 32 bytes long. Be sure to discard the first 3072 bytes of the pseudo random numbers. THE KEY OR THE INPUT TEXT MUST NOT BE CODED IN THE PROGRAM. Test your program with the following plain text: In cryptography, RC4 (Rivest Cipher 4 also known as ARC4 or ARCFOUR meaning Alleged RC4) is a stream cipher. While remarkable for its...
Cyber Security Systems Question: Which of the following best describes RC4: Byte oriented block cipher Bit oriented block cipher Byte oriented stream cipher Bit oriented stream cipher
Implement the RC4 stream cipher in C++. User should be able to enter any key that is 5 bytes to 32 bytes long. Be sure to discard the first 3072 bytes of the pseudo random numbers. THE KEY OR THE INPUT TEXT MUST NOT BE HARD CODED IN THE PROGRAM. program should be tested by a plain text You should write TWO PROGRAMS: encryption and decryption. The encryption program should input the plaintext file and output a cipher text in...
Which mode of DES functions by means of taking each block of cipher text and XORing it with the next plain text block to be encrypted with the result of a dependency on all the previous blocks? A. ECB B. CBC C. CFB D. OFB
Which mode of DES functions by means of taking each block of cipher text and XORing it with the next plain text block to be encrypted with the result of a dependency on all the previous blocks? A. ECB B. CBC C. CFB D. OFB
41. Which of the following cipher systems uses polyalphabetic substitution? A. Vigenère B. Substitution C. Transposition D. Shift 42. Which encryption algorithm can have key sizes of 128, 192, and 256 bits, with the key size affecting the number of rounds used in the algorithm? A. SHA B. RC С. AES D. DES 43. Which of the following security principles ensures that the sender and the recipient of a message are informed that the message was not altered in transmission?...
Suppose an LFSR of degree 5 is used as a stream cipher and the following plaintext m and ciphertext c is known: m = 00100 11000, c = 10110 01110. Compute the feedback polynomial, the characteristic polynomial, the period and the complete keystream.
14. TKIP/RC4 encryption adds an extra of overhead to the body of an 802.11 MPDU. A. 16 bytes B. 12 bytes C. 20 bytes D. 10 bytes E. None of the above 15. An HT client STA is transmitting to an HT AP using modulation and coding scheme (MCS)#12 that defines 16 - QAM modulation, two spatial streams, a 40-MHz bonded channel and an 800 ns guard interval to achieve a data rate of 162 Mbps. According to the IEEE,...
QUESTION 6 What is a hash? O a. A variable key-size stream cipher with byte-oriented operations. The algo Ob. A one-way function that compiles streams of data into a message digest O c. Is used to ensure programs load correctly. Od. Checks the correctness of a program.
1) the matrix theory is used in the ___ technique a) hill cipher b) monialphabetic icpher c) playfair cipher d) vignere cipher 2) a polyalphabetic cipher uses many ___ a) keys b) transpositions c) codes d) monoalphabetic substitution rules