U.S. National Institute of Standards and Technology (NIST)
Advanced Encryption Standard (AES)
Data Encryption Standard (DES)
Schneier B: Applied Cryptography
NESSIE New European Schemes for Signatures, Integrity, and Encryption
RSA Security Laboratories
A list of commonly used cryptographic algorithms and methods
Cryptography
Cryptography links
Algorithms and Attacks
The Security Portal for Information System Security Professionals

NIST: Modes of Operation
CBC/OFB/CFB - Basic Block Cipher Modes
CTR - Counter Mode Encryption
CCM - Counter Mode with CBC-MAC
OCB - Offset Code Book
Phillip Rogaway, Mihir Bellare, John Black, Ted Krovetz

Rijndael (by Joan Daemen, Vincent Rijmen)
Serpent (by Ross Anderson, Eli Biham, Lars Knudsen)
Twofish (by Bruce Schneier, Kelsey, Whiting, Wagner, Hall, Ferguson)
RC6 (by Ron Rivest, Robshaw, Sidney, Yin)
Blowfish (by Bruce Schneier)
Mars (von IBM)
The Tiny Encryption Algorithm (TEA) (von Simon J. Shepherd)

Elliptic Curve Cryptography C++ Library
Certicom
Certicom: Online Elliptic Curve Cryptography Tutorial
The IEEE P1363 Home Page
ANSI X9.62
Software Implementation of Elliptic Curve Cryptography Over Binary Fields
High-speed Software Multiplication in F 2 m
Itoh-Tsujii Inversion Algorithm
The Elliptic Curve Digital Signature Algorithm (ECDSA)
Fast multiplication on elliptic curves over GF(2m) without precomputation

PGP

GOST-Hash
HAVAL
MD2 (by Ron Rivest)
MD4 (by Ron Rivest)
MD5 (by Ron Rivest)
SHA-1
SHA224 / SHA256 / SHA384 / SHA512
Tiger (by Ross Anderson, Eli Biham)
The Hashing Function Lounge
Hash Functions
MessageDigest Algorithms
An Illustrated Guide to Cryptographic Hashes

U.S. Standard, DoD 5220.22-M (National Industrial Security Program Operating Manual)
Peter Gutmann (Secure Deletion of Data from Magnetic and Solid-State Memory)
Data Management: Data Preservation and Destruction
Cryptome: How to securely erase hard drives
Heidi Eraser

insecure.org
Phrack
Openwall Project
Digital Information Society
Synnergy Networks
Electronic Frontier Foundation
The Hacker's Choice
Virus.Org :: Information Technology Security News And Updates
Next Generation Security Software
The Intelligent Hacker's Choice..
The Last Stage of Delirium Research Group
Technology Page - Hacking - Cryptography
Cryptography and Security
Online resources for collecting and processing crypto-strength randomness

Sysinternals - Advanced Utilities
www.packetstormsecurity.org
Ethereal: A Network Protocol Analyzer
RAID International Symposium on Recent Advances in Intrusion Detection
Security Project - Netzwerke

OllyDbg

Metasploit Project
New Order - computer security and networking portal
Security Project - Sicherheitslücken
Shatter Attacks - How to break Windows
Beyond-Security's SecuriTeam.com
Shellcode Development - Advanced Windows Shellcode
k-otik.com - exploits
Xfocus - Team
Shellcode
Advanced buffer overflow exploit
A Unique Examination of the Buffer Overflow Condition
www.web-hack.ru/exploit/
A Buffer Overflow Study - Attacks & Defenses
Avoiding security holes when developing an application - Part 2: memory, stack and functions, shellcode
The Art of Writing Shellcode
Buffer Overflows, Shellcode, Exploits
NGSEC Research Team
nologin.org
Polymorphic Viruses

Winace DLL
BigSpeed Zip DLL

Blum Blum Shub
ISAAC
RC4 Analysis
pseudo-random number generators at the pLab site