XTea Encryption for Delphi
- Delphi implementation of XTea encryption algorithm and also utility for embedding encrypted strings into Delphi application.
- http://www.irnis.net/soft/xted/

Triade Systems
- Implementations of FGINT (Fast Gigantic INTegers) and many asymmetric encryption algorithms (RSA, DSA, ElGamal, Elliptic Curve, EC-DSA, and EC-ElGamal). Freeware with Delphi and free pascal source code.
- http://www.submanifold.be/

PGP Components for Delphi
- Provide encoding and decoding, creating and verifying file detached signatures, key management functions (DH/DSS, RSA), keyserver functions, utilities. [Open source, MPL]
- http://idw-doc.homepage.t-online.de/PGPcomp.htm

StreamSec StrSecII
- A collection of optimized cryptography components and routines for Delphi 4-6. The integrated ASN.1 support allows building of X.509 certificates using native Delphi code. Also implements 3DES, Twofish, and Rijndael (AES) in ECB, CBC, OFB, CFB, CTR, PCFB
- http://www.streamsec.com/

Delphi Cryptography Stuff
- Implementations by Dave Shapiro of two symmetric encryption algorithms (Blowfish and DES) and several message digests (MD2, MD4, MD5, SHA-1, and RipeMD-160). Freeware with Delphi source code.
- http://www.csd.net/~daves/delphi/

efg's Cryptography and Math Functions
- Comprehensive compilation of cryptography and high-precision math resources for Delphi (mirrored on Borland's website). Computer lab also features dozens of practical mathematics and graphics projects. Delphi source code with quality annotations.
- http://www.efg2.com/Lab/Library/Delphi/MathFunctions/Cryptography.htm

Ciphersaber Home Page
- Support crypto freedom by learning how to write your own strong encryption program. This site explains concept and implementation ideas.
- http://ciphersaber.gurus.com/

Advanced Encryption Components by TSM, Inc.
- Professional quality tools for adding symmetric (Blowfish, Twofish, and Rijndael) and public key encryption (Elliptic Curve, RSA) into Delphi and C++Builder applications, plus cryptographic hashes and copy protection software. Freeware components (withou
- http://www.crypto-central.com/