[CST-2] Bit of Security, for a change

[Matej Pfajfar]

> Quick security question, basically concerns 1998 paper 7 question 9.
> Basically asks whether a digital signature on a 32bit MAC is more secure
> than a 128 bit Hash, and why.
I just got up so sorry if this is rubbish -
A MAC is cryptographically secure, whereas an ordinary hash is not.
You need to know the key to be able to generate/verify the MAC. =>
signatures are more difficult to forge/the sender can't plausibly deny
that he/she sent the message etc.
hth,
Mat

Matej Pfajfar
St John's College, University of Cambridge, UK

GPG Public Key @ http://matejpfajfar.co.uk/keys
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