How SPac Works
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SPac combines compression and (optional) encryption in a single package.

Encryption is handled using the very secure BlowFish algorithm with a key length of 448 bits. The password used to encrypt files is not applied directly, but is used as the input value to a hash algorithm (SHA-1) that generates a key value that matches the maximum key length of the BlowFish encryption algorithm.

Compression is based on LZH compression and is comparable in speed and compression to the popular PKZip tool.


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