RSA Key Pair Generation

An RSA key pair consists of an RSA private key, which is used to compute a digital signature, and an RSA public key, which is used to verify a digital signature. An RSA key pair used for
digital signatures shall only be used for digital signatures, not for other purposes (e.g., key establishment).

An RSA public key consists of a modulus n, which is the product of two positive prime integers [..]

DSA Signature Verification and Validation

Signature verification may be performed by any party (i.e., the signatory, the intended recipient or any other party) using the signatory’s public key. A signatory may wish to verify that the computed signature is correct, perhaps before sending the signed message to the intended recipient.

The intended recipient (or any other party) verifies the signature to determine its authenticity.

Prior to verifying the signature of a signed message, the domain parameters, and [..]