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COMP2300 Applied Cryptography / COMP6300
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Consider the linear feedback shift register shown in the figure.
What are the first two bits of feedback?
Note: the first bit of the feedback should be written as the leftmost bit, and so on.
Consider the linear feedback shift register shown in the figure.
What are the first four bits of output?
Note: the first bit of the output should be written as the leftmost bit, and so on.
One way to compute using a calculator which only computes logarithms to the base is to use:
You suspect that the following ciphertext is encrypted using a Caesar Cipher. You know that the plaintext is in the English language. What is the most probable decryption of the letter "H"?
HOHYHQHOYHVFHOUDWHGHHADFOOHQWHYHQWV
The multiplicative inverse of 3 modulo 10 is?
The work factor is defined as the amount of computation required to break a cryptosystem. Work factor is generally a function of the size of
Let . The correct way to write in PARI/GP is:
What is the greatest common divisor of and ?