| Message Digests (aka Digital Signatures) |
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| • | A
message digest is a non-reversable |
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| algorithm
which reduces a message to a |
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| fixed-length
“summary” |
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| • | The
summary has the property that a change |
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| to
the original will produce a new summary |
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| • | The
probability that the new summary is the |
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| same
as the old should be 1/(size of digest) |
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| • | Tanenbaum,
p. 590 (§9.2.4) |
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