• DISCUSSION OF DIFFERENT TYPES OF PUBLIC KEY INFRASTRUCTURE IN REAL LIFE

Abstract

Since public keys in asymmetric cryptosystems need not be kept se­cret, key management in those systems is simpler than in symmetric schemes. Private keys, however, must be kept secret. Also, public keys must be protected from falsification and abuse. Therefore, ap­propriate public-key infrastructures (PKI) must be set up. They are responsible for key distribution and management. In this paper, we describe how such public-key infrastructures work.