Cryptography

The purpose of **Telenet ** is to remote login. It is insecure. Telnet was impossible to encrypt as in FTP (File transfer protocol). Secure Shell (SSH) replace telnet. The Netstat command gives the status of ou are hooked up to. NAT= Network Address Translation PAT= Port Address Translation (share 1 external IP) ** D.O.L.L.S. **
 * Cryptography I **
 * D**iversity – Don’t run 1 kind of protection. Example: Different password types, SW OS, mix up servers
 * O**bscurity- Hide your information! Ex: OS, Apps, Internal Addresses (NAT/PAT)
 * L**imiting – Limit physical access. Ex: Role Based Access Controls (RBAC)/IBAC, privileges
 * L**ayering – Have multiple obstacles
 * S**implicity- Usability built into the system Ex. Biometrics, management tools

· Security Increase, Productivity Decreases

** Passwords ** Formula = (symbol)Length ASCII are a string of 8 bits that equal a character. The strongest password is random! · Guess (default password, familiar names,ect) · Dictionary (words, names) · Brute Force (every possible combination of symbols) · Rainbow Table (list of passwords up to a certain length – hash) Passphrase : A sequence that makes sense to you and no one else
 * Types of Attacks **