Suppose a 1 a 2 a 3 a 4 are the 4 bytes in a 32-bit word.
Question:
Suppose a1a2a3a4 are the 4 bytes in a 32-bit word. Each ai can be viewed as an integer in the range 0 to 255, represented in binary. In a big-endian architecture, this word represents the integer
In a little-endian architecture, this word represents the integer
a. Some hash functions, such as MD5, assume a little-endian architecture. It is important that the message digest be independent of the underlying architecture. Therefore, to perform the modulo 2 addition operation of MD5 or RIPEMD-160 on a big-endian architecture, an adjustment must be made. Suppose X = x1x2x3x4 and Y = y1y2y3y4. Show how the MD5 addition operation (X + Y) would be carried out on a big-endian machine.
b. SHA assumes a big-endian architecture. Show how the operation (X + Y) for SHA would be carried out on a little-endian machine.
Step by Step Answer:
a 1 Interchange x1 and x4 x2 and x3 y...View the full answer
