ITM 301 Lecture Notes - Mime, Public Key Infrastructure, Email Encryption

• School: Ryerson University
• Department: Information Technology Management
• Course: ITM 301
• Professor: Farid Shirazi

Document Summary

2- review final exam: file security, communicate channel security, viruses, methods to secure a network. Contain 2 key, one is public, the other key is private. There are 2 types of email encryption using pki or rsa algorithm: pgp pretty good privacy, smme: secure multi-purpose internet mail extensions. There are other encryption methods used by different operating systems: e. g: des: data encryption system, 56 bit encryption, 3des : 128-bit encryption. Aes: advance encryption system widely used with channel security, vpn, & ipsec. 2- channel security: by default all communication channels are non-secure communication (plain text, virtual private network is a method of securing communication channel when using a public network. 1. pptp: point to point tunneling protocol (modem) Note pptp encrypt data with 56-bit encryption method. L2tp with ipsec provides a vpn secure channel by using aes 128 bit. Both client & server must be able to authenticate themselves to each other at any given time.