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24 lines
1.2 KiB
Plaintext
24 lines
1.2 KiB
Plaintext
The Data Encryption Standard (DES), also known as Data
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Encryption Algorithm (DEA) is a semi-strong encryption and
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decryption algorithm.
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The module is 100 % compatible to Crypt::DES but is implemented
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entirely in Perl. That means that you do not need a C compiler
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to build and install this extension.
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The module implements the Crypt::CBC interface. You are
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encouraged to read the documentation for Crypt::CBC if you
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intend to use this module for Cipher Block Chaining.
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The minimum (and maximum) key size is 8 bytes. Shorter keys will
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cause an exception, longer keys will get silently truncated.
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Data is encrypted and decrypted in blocks of 8 bytes.
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The module implements the Ultra-Fast-Crypt (UFC) algorithm as
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found for example in the GNU libc. On the Perl side a lot has
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been done in order to make the module as fast as possible
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(function inlining, use integer, ...).
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Note: For performance issues the source code for the module is
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first preprocessed by m4. That means that you need an m4 macro
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processor in order to hack on the sources. This is of no concern
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for you if you only want to use the module, the preprocessed
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output is always included in the distribution.
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WWW: https://metacpan.org/release/Crypt-DES_PP
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