The Dolphin Encryption Library

The Dolphin Encryption Library is a C function library with which
programmers can add encryption and decryption capabilities to their MS-DOS
applications.

Data is encrypted using a symmetric encryption key without which the
encrypted data cannot be read. The key is supplied by the programmer,
perhaps after being obtained from the user of an application. The
encryption key can be from 10 to 60 characters in length and case is not
significant.

The library contains 16 functions. The main functions are for encrypting
and decrypting blocks of data in memory. These blocks can be anything from
1 byte to 16K in size. There is also a function which can be called to
encrypt and decrypt information in disk files (there is no restriction on
the size of the file or its type). There are also binary-to-text and
text-to-binary functions.

The encryption process makes use of the RSA Data Security, Inc., MD5
Message Digest Algorithm, and combines several different methods of
encipherment. Encrypted data appears even to special analysis tools as
composed of random bytes.

The library is supplied in small, medium and large models suitable for
linking with Microsoft- and Borland-compiled object modules. There is a
printed manual which clearly explains the use of the functions, with six
sample programs. The manual includes explanations of a test program and of
a demonstration program. It also includes a detailed description of the
encryption process used and complete source code for all functions in the
library and the code for the test and demonstration programs.

A single-user license for the Dolphin Encryption Library is available for
$160.00. Commercial use of the library is possible with a distribution
license. A Clipper version of the library is in preparation.

Dolphin Software, 48 Shattuck Square #147, Berkeley, CA 94704
510-464-3009

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