Re: What does the MAC in IES or ECIES achieve ?
- From: fabrice.gautier@xxxxxxxxx
- Date: 31 Oct 2006 11:53:50 -0800
Mark Wooding wrote:
fabrice.gautier@xxxxxxxxx <fabrice.gautier@xxxxxxxxx> wrote:
Okay, so obviously, with the MAC in IES, I can detect if the ciphertext
has been tampered with.
But since IES doesnt provide authentication anyway (the sender doesnt
even need a Public Key), what good does that do?
You should maybe read Victor Shoup's exposition `Why chosen ciphertext
This paper is excellent. Especially for non experts, I think.