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: It supports archives containing over 2 billion files and can handle individual files over 9 exabytes in size.

"PKZip" (often associated with the .zip file format) is a classic data compression tool used to archive and encrypt files. It was originally created by Phil Katz and marketed by PKWARE.

: While basic versions use passphrase protection, advanced versions like SecureZIP offer digital signature authentication and certificate-based encryption. Technical Structure

: An optional footer used depending on specific flags set in the header, as detailed by JMU Computer Science . Common Issues

Here is some helpful information for understanding and using it: Key Features