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Internet Security - Dang Thanh Binh's Page

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HASH FUNCTION, MESSAGE DIGEST AND HMAC 147<br />

Using Table 4.5, I(b, c, d) can be computed as follows:<br />

b: 1000 0001 0100 1101 1011 1100 1100 1111<br />

c: 0001 0100 1111 0011 0101 0110 1101 0010<br />

d: 1001 1111 1011 0011 1011 1011 0100 0110<br />

I(b, c, d): 1111 0101 1011 1110 1010 1010 0010 1101<br />

f 5 b e a a 2 d<br />

Compute Z = a + I(b, c, d) + M[0] + T[49]<br />

a: fbc16051<br />

I(b, c, d): f5beaa2d<br />

M[0]: 7a138b25<br />

T[49]: f4292244<br />

Z : 5fbcb7e7<br />

Z = 0101 1111 1011 1100 1011 0111 1110 0111<br />

Since Z ′ = Z

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