[cryptography] Using same key for ECDSA and ECIES

Dominik Schürmann dominik at dominikschuermann.de
Fri Sep 20 08:22:11 EDT 2013


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I am wondering if it is okay to use the same asymmetric ECC key for
ECDSA and ECIES. Given that the signing and encryption algorithms are
not related like in RSA, I assume it is okay to use the same key for
both operations.

Are there any things I need to pay attention to when combining both
schemes using same keys? Can Bob decrypt messages by forcing Alice to
sign messages? (as in naive RSA implementations).

Regards
Dominik
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