The use of compressed files is mainstream and many format-algorithm combinations exist to reduce the amount of data stored on computer or exchanged over the Internet.
One of the most used, and historical, compression format is ZIP. The standard has originally been developed by Phil Katz (PK) and te latest specfications, 6.3.10, by PKware and can be found at [1].
Initially, ZIP files could not be encrypted but encryption features have been added over time. It is possible to encrypt co
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