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Elliptic curves are algebraic-geometric structures with applications in cryptography. Such a curve consists of the set of solutions to a cubic equation over a finite field equipped with a group operation. Questions relating to elliptic curves and derived algorithms should use this tag and might also consider more specific tags such as discrete-logarithm and ecdsa.

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Is it safe to use same private key in two or more EC signature algorithms?

Given two (or more) algorithms: ed25519 private key is random blob of 32 bytes public key is encoded point on Edwards 25519 curve. ECDSA with secp256k1 private key is random blob of 32 bytes pu …
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