Ricoh Pro 8100 EX User Guide - Page 519

5. Enhanced Network Security Security level Security level features Authentication and Low Level Encryption Select this level if you want to encrypt the data packets as well as authenticate the transmission partner and prevent unauthorized packet tampering. Packet encryption helps prevent eavesdropping attacks. This level provides less security than "Authentication and High Level Encryption". Authentication and High Level Encryption Select this level if you want to encrypt the data packets as well as authenticate the transmission partner and prevent unauthorized packet tampering. Packet encryption helps prevent eavesdropping attacks. This level provides higher security than "Authentication and Low Level Encryption". The following table lists the settings that are automatically configured according to the security level. Setting Authentication Only Authentication and Low Level Encryption Authentication and High Level Encryption Security Policy Apply Apply Apply Encapsulation Mode Transport Transport Transport IPsec Requirement Level Use When Possible Use When Possible Always Require Authentication Method PSK PSK PSK Phase 1 Hash Algorithm MD5 SHA1 SHA256 Phase 1 Encryption Algorithm DES 3DES AES-128-CBC Phase 1 DiffieHellman Group 2 2 2 Phase 2 Security Protocol AH ESP ESP 144