Cab340 – - Study guides, Class notes & Summaries

What is Kerberos? - For authentication of users and services on distributed systems What are the 3 servers involved in Kerberos and what do they provide to the user? - KAS - issues a TGT to help communicate with TGS TGS - issues a ST to help log into remote server Server- C can login to S using an account on KAS What does WEP provide? - Login authentication, message confidentiality/integrity/authentication for 802.11 WEP Login Process - - AP sends 128-bit challenge in plaintext - Client ...

Symmetric cipher - A single key is used for both encryption and decryption and is only known by the sender and receiver. Asymmetric cipher - Separate but related keys are used for encryption and decryption. Each person has a public and private key. Security model - What resources the adversary has available and what they are trying to achieve. Adversarial powers - Their computational capability, access to various inputs and outputs of the system and their access to oracles. Adversarial go...

Confidentiality - Only authorised people can read a message. A key is needed in order to read the message. Authentication - Only authorised people can write a message. A key is needed in order to write the message. Symmetric key cipher - KE = KD (or can easily be deduced from one another). Symmetric key cipher - Encryption and decryption keys known only to the sender and receiver. Symmetric key cipher - Requires a secure channel for transmission of the cryptographic key. Asymmetric key...