Advantages of digital signatures over MACs?
in [Cryptography]
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From: mark on 28 Feb 2010 11:03 Why would one use a digital signature, rather than a simple MAC? Besides being signed with an asymmetric encryption scheme, rather than a shared symmetric key, what's so different?
From: mike clark on 28 Feb 2010 11:09
On Feb 28, 9:03 am, mark <cheesemonke...(a)gmail.com> wrote: > Why would one use a digital signature, rather than a simple MAC? > Besides being signed with an asymmetric encryption scheme, rather than > a shared symmetric key, what's so different? Non-repudiation. With a symmetric key, one of 2 parties could have signed the message. With asymmetric, only one party could have signed it, and they can't repudiate that. Mike |