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In TLS 1.3 and TLS 1.2 does the EC curve used in ECDHE need to be the same as the one used for ephemeral key generation?

pg flag

In TLS 1.2 and TLS 1.3, does the EC curve used in ECDHE calculation of the premaster secret, does it need to be the same curve as that used to generate the ephemeral keys at the client and server sides?

For example can I use secp521r1 for ECDHE calculations and secp256r1 for ephemeral key generation?

Marc Ilunga avatar
tr flag
Isn't this the same question as before?
Maarten Bodewes avatar
in flag
Please do not post the same question twice. Not sure if this was a mistake or deliberate attempt to get answers faster, but it is not allowed.
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