文件名称:
MD5 HASHING FOR VFP
开发工具:
文件大小: 30kb
下载次数: 0
上传时间: 2008-07-11
详细说明： MD5 for VFP is derived from the RSA Data Security, Inc. MD5
Message-Digest Algorithm. MD5 is a hashing function that accepts a
string of arbitrary length and generates a 16-byte encrypted
"message digest" that is (a) unique and (b) not reversible. It is
much more reliable than a checksum. Unlike sys(2007), it does not
produce duplicates. (The probability of a duplicate is estimated
at one case in 2^64; i.e., 18 x 10^18, which should be good eno ugh
for most of us.)
The MD5 algorithm is intended for digital signature applications,
where a large file must be "compressed" in a secure manner before
being encrypted with a private (secret) key under a public-key
cryptosystem such as RSA.
MD5 has been implemented for Visual Foxpro by Duke Lotherington, of
Visual Records in San Diego, by wrapping the C++ function into an
FLL library.
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