Compression ("Zipping") Files

 

Compressing (often known as "Zipping") reduces the size of the file without losing any information. Once the file is decompressed ("Unzipped") the file returns in size and content to a state exactly matching the original.

 

Within cryptography, compressing files prior to encryption also makes cryptanalysis (decrypting without having access to the  Password or Pass Phrase) much more difficult.

 

From a space saving and cryptographical basis compressing files is recommended.

 

However compressing (and decompressing after decryption) adds more time to the total encryption and decryption event.

 

See - Enabling the “Compress/Decompress Files” option