[Cryptography] Elliptic curve question

[Lodewijk andré de la porte]

2013/10/10 Phillip Hallam-Baker <hallam at gmail.com>

>  The original author was proposing to use the same key for encryption and
> signature which is a rather bad idea.
>

Explain why, please. It might expand the attack surface, that's true. You
could always add a signed message that says "I used a key named 'Z' for
encryption here". Would that solve the problem?
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