1)
OpenSSL 0.9.7c
Open SSL 0.9.7c lets applications use Secure Sockets Layer (v2/v3), Transport Layer Security (v1), and a general-purpose cryptography library, for data integrity, authenticity, and privacy security features. Perl or Cygwin needed for Win32 compile.
2)
Encryption Toolkit 2003 Trial Edition 1.0
The Encryption Toolkit includes all the tools you need to add file encryption and data encryption to your applications. The toolkit includes COM encryption objects with a standard interface for both the Pocket PC and Windows® desktop platforms.
3)
Xceed Encryption Library 1.1
The Xceed Encryption library allows you to easily add strong encryption and decryption capability to your Windows applications. Supports the latest industry-standard strong encryption algorithms and offers both symmetrical and public-key cryptography
4)
cryptlib 3.0
Security toolkit with strong encryption and authentication. Supports many algorithms for symmetric/asymmetric encryption, authentication, and hashing. Free for non-commercial/shareware projects. Written in C. ActiveX and C++ wrappers are available.
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