The Cisco Secure PIX Firewall 525 is part of the world-leading Cisco Secure PIX Firewall series, providing today's networking customers with unmatched security, reliability, and performance ideal for protecting the enterprise headquarters' perimeter, the PIX 525 delivers full firewall protection, as well as IP security (IPsec) virtual private network (VPN) capabilities.The PIX 525 enables secure private communications over the Internet or any IP network. It integrates key features of VPNs - tunneling, data encryption, security, and firewalling - to provide a secure, scalable platform to better and more cost-effectively accommodate remote-access, remote-office, and extranet connectivity using public data services. The PIX 525 provides users with a complete implementation of IPsec standards. IPsec ensures confidentiality, integrity, and authenticity. For secure data encryption, Cisco's implementation of IPsec supports both the 56-bit Data Encryption Standard (DES) and 168-bit Triple DES algorithms. The PIX 525 with a restricted software license provides the entry to enterprise level security and performance.