DSA a variant of the ElGamal and Schnorr Signature Schemes Public key cryptographic system used for generating and verifying digital signatures Cannot be used for data encryption or key exchange Based on familiar number theory concepts Makes use of the Secure Hash Algorithm (SHA-1)25 DSA • A variant of the ElGamal and Schnorr Signature Schemes • Public key cryptographic system used for generating and verifying digital signatures • Cannot be used for data encryption or key exchange • Based on familiar number theory concepts • Makes use of the Secure Hash Algorithm (SHA-1)