Computers and Technology

Computers and Technology, 22.07.2019 19:00, swspanda179400

Ais a number that summarizes an encrypted information. digital certificate hash function message digest hash algorithm

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Computers and Technology, 13.07.2019 04:20, Dragonskeld

Given input {4371, 1323, 6173, 4199, 4344, 9679, 1989} and a hash function h(x) = x (mod ( 10), show the resulting a. separate chaining hash table b. hash table using linear probing c. hash table using quadratic probing d. hash table with second hash function h2(x) = 7 - (x mod 7)

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Computers and Technology, 28.08.2019 21:10, miko96

3.1 list three approaches to message authentication. 3.2 what is a message authentication code? 3.4 what properties must a hash function have to be useful for message authentication? 3.5 in the context of a hash function, what is a compression function? 3.6 what are the principal ingredients of a public-key cryptosystem? 3.7 list and briefly define three uses of a public-key cryptosystem. 3.8 what is the difference between a private key and a secret key? 3.9 what is a digital signature?

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Computers and Technology, 28.09.2019 18:50, WilliamYES9164

Ais created by using a secure hash function to generate a hash value for a message and then encrypting the hash code with a private key.

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Computers and Technology, 25.10.2019 02:43, rimidavisrimi795

Consider problem 3.1 from the required textbook for this course. that is, a 32-bit hash function defined as the concatenation of two 16-bit functions: xor and rxor. xor is described in section 3.2 as a simple vertical parity check, assuming that the hash is initialized to all zeros. rxor is described as a 1-bit left-shift rotation performed on the current hash value before each block (in sequence) is being xor-ed with it. that is, process each successive n-bit block of data: a. rotate the current hash value to the left by one bit. b. xor the block into the hash value. is it true that the following bit flips result in finding a message different than the original and that this new message "produces" the same hash? hint: write the original rxor hash and compare it to the final rxor hash you compute.

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