Download : Programming : Library Components : Library with encryption and math functions 
Encryption functions (public key/ secret key) and huge integer math functions  Windows Shareware $59. Huge Integer Math and Encryption library.  A cryptography toolkit for Windows with public key and secret key encryption, data security and digital signatures with oneway secure hash functions.  Public (asymmetric) key encryption and digital signatures with RSA. Optional PKCS#1 v1.5 RSA padding.  Secret (symmetric) key encryption with AES (Rijndael) or ArcFour (RC4 compatible).  Hash functions: SHA512, SHA256, SHA1, MD5, CRC32.  FIPS 198 HMAC.  Huge prime number generation, factoring and cryptographically secure random number generation (a.o. BlumBlumShub). True random number data from an internet server.
HIME: Huge Integer Math and 2.05 17Jan08 English 1.2 MB
 DiffieHellman key exchange algorithm.  Compression / decompression with multiple compression algorithms.  Threadsafe for use in multithreaded applications.  Functions for converting data between various formats: huge integer, Base64, decimal, hex, ascii binary.  Securely erasing disk files and free disk space.  Huge integer number mathematical, bit manipulation and boolean functions can serve as building blocks for implementing other public key encryption schemes or performing math calculations with arbitrary precision.  Number theory applications.  A huge integer number in HIME can be hundreds of millions of digits long; 2^31 (2147483648) bits long. MILLIONS of decimal digits!  HIME is a 32 bits dll. Every programming language that can access a standard Win32 dll can use HIME: C, C++, C#, Visual Basic 5/6, VB.Net, Delphi, PowerBASIC, PureBASIC, Liberty Basic, Euphoria, Java, Macromedia Director (with GLU32)...  .NET (dot NET) languages can use HIME as an 'unmanaged code dll'.  Demo and test programs (including their source code) to show HIMEs performance and as an example of how to use HIME.  Demo code in Visual Basic 5/6, C++, C#, VB.Net, Liberty Basic, Delphi, PowerBASIC and PureBASIC are also included. HIME was written in PowerBASIC (*) and inline assembler. HIME is designed to support all Windows versions.
Dll Library Public Key Secret AES Rijndael RSA Digital. Signature 512 Diffie Hellman RC4 Arbitrary Precision Multiple MD5 256 Compression Securely Erase Files Functions.  HIME: Huge Integer Math and Encryption
