Public-Key applications can classify uses into 3 categories encryption/decryption(provide secrecy digital signatures(provide authentication) key exchange(of session keys) some algorithms are suitable for all uses others are specific to one. only three algorithms work well for both encryption and digital signatures: RSA, ElGamal, and Rabin all of these algorithms are slow3 Public-Key Applications • can classify uses into 3 categories: – encryption/decryption (provide secrecy) – digital signatures (provide authentication) – key exchange (of session keys) • some algorithms are suitable for all uses, others are specific to one. Only three algorithms work well for both encryption and digital signatures: RSA, ElGamal, and Rabin. All of these algorithms are slow