For an academic application, I use
AES-GCM to encrypt my frames between 2 parties.
To enhance security, and reduce the possibility of replay, I'd like to use a
TimeStamp in my frame exchanges. But, as I use the GCM mode, I need to tranmsit the
Initialisation Vector besides the
ciphertext (and the MAC).
My idea is : could it be possible to use the IV as TimeStamp as well ?
IV would thus be used for decryption of the
ciphetext, and then to check if the message is not too old.
Thus, a modification in the
TimeStamp will make the
The next step wil be to produce a
TimeStamp in a long form, as not to reduce security. Any ideas how to emit a
TimeStamp like this ?