ITPRC - Virtual Private Networks & Encryption

General Encryption Resources

Cryptome In - Clearing house of news on cryptography
D.O.E. SysWorks - Information and articles on cryptography, encryption, and PKI
Entrust White Papers - Several white papers on PKI technology
International PGP Home Page - Downloads, resources and links to information on Pretty Good Privacy
SSH's Technical Corner - Resources and papers on SSL, IPsec and cryptography
Summary of E-Commerce and Digital Signature Legislation - News and information on legal issues surrounding e-commerce and digital signatures
SOCKS5 Framework Site - Information on and resources for SOCKS5
Cryptography Management - Guide, presentations and information for beginners
ISO 17799 - The ISO standard dedicates Section 10 to encryption.

IPSec

Cryptographic evaluation of IPsec - Counterpane's in-depth assessment of IPsec
IPSec Configuration - Describes how to implement IPSec on many UNIX distributions
IPSec Network Security - Cisco's guide to IPsec technologies and implementation
IPSec Working Group - Home page for the IETF's IPsec working group
Linux FreeS/WAN - an open-source implementation of IPSEC & IKE for Linux
Using IPSec Simplified - IBM White paper by IBM

Public Key Infrastructure (PKI)

Digital Signature Trust Education Center - DST's links to white papers and tutorials on PKI
PKI Law - A PKI information exchange emphasizing emerging legal issues
The PKI Page - Links to various sites and documents which are related to Public Key Infrastructure (PKI) stuff, especially links to all Certification Authorities (CAs)
Public-Key Infrastructure (X.509)(pkix) - The IETF's Public Key Infrastructure working group for developing Internet standards for X.509 based PKI

Secure Sockets Layer (SSL) / Transport Security Layer (TSL)

Aventail White Papers - Various white papers on SSL and SSL VPNs
IETF Working Group on Transport Layer Security - Links to papers, mailing lists, and archived discussions for the TLS working group

Virtual Private Networking (VPN)

Check Point's VPN Resource Library - Collection of white papers and other resources on VPNs
FindVPN - Provides vendor information and industry news on VPNs (An ITPRC "Link of the Week")
Virtual Private Network Consortium (VPNC) - An international trade association for manufacturers in the VPN market. Provides a large collection of white papers and other VPN related information
VPN FAQ - By Core Competence - Explains emerging technologies such as SSL and network based VPNs as well
VPN Information - Tons of links to VPN info, by dTool
VPN Information on the World Wide Web - Collection of links to VPN information
VPN Insider - News, resources and information on VPNs
VPN Labs - A non-profit VPN information portal with a growing index of resources. Also helps answer VPN related questions through their Dr. VPNlabs service
VPN Top Issues - Top support issues for Cisco VPN products