Questions tagged [secp256k1]

This tag should be used for anything related to the secp256k1 algorithm used for Bitcoin's public key cryptography.

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Is it acceptable to use a HMAC-SHA256 hash as a secp256k1 private key?

Say I want to generate a deterministic private key related to some data, for instance to a domain name. The easiest way I can think of is: take a secret material which will work as "generator&...
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Is there a relationship between the secp256k1 public key of the sum of two private keys, and the public keys of those original two private keys?

If I have two secp256k1 private keys and add them together, can I derive the public key for the sum, if I only know the public keys for the two original private keys? (I think this may be the core of ...
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Is there a relation between the private keys of secp256k1 public keys of opposite parities?

From observation, 32 bit public key values of opposite parities are either both valid, or both invalid. ...