Challenge-Handshake Authentication Protocol (CHAP) is a protocol that is used to authenticate a user or a host to an authenticating entity. This protocol is used by Point-to-Point Protocol (PPP) to authenticate network hosts or routers that connect using a PPP link....
RSA (Rivest–Shamir–Adleman) cryptosystem is a public-key cryptosystem that is widely used for secure data transmissions. It was first described by three cryptographers, Ron Rivest, Adi Shamir, and Leonard Adleman, in 1977. And, the cryptosystem is named after the...
What is the Kerberos Protocol? Kerberos is a network authentication protocol using which a node in a non-secure network can verify the identity of another node securely. As per Greek mythology, Cerberus or Kerberos is a multi-headed dog whose job is to guard the gates...
The ElGamal encryption algorithm is a public key encryption algorithm that was described by the Egyptian cryptographer Taher Elgamal in 1985. This encryption algorithm is used in many places. Many of us may have also used this encryption algorithm in GNU Privacy Guard...
What is Access Control? All users may not have permission to access all the resources in a system or network. A system should be able to allow or deny access to certain resources based on the identity or role of the user or the group the user belongs to. This can be...
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