256-bit AES is stronger than 128-bit AES, but both of them can provide significantly greater security than the standard Zip 2.0 method described below.Īn advantage of 128-bit AES is that it is slightly faster than 256-bit AES, that is, it takes less time to encrypt or decrypt a file. These numbers refer to the size of the encryption keys that are used to encrypt the data. WinZip supports AES encryption in two different strengths: 128-bit AES and 256-bit AES. This encryption method, also known as Rijndael, has been adopted by NIST as a Federal Information Processing Standard. Government's National Institute of Standards (NIST). The ZIP file format permits a number of compression algorithms.ĪES encryption: AES is the Advanced Encryption Standard, which is the result of a three-year competition sponsored by the U.S.

A ZIP file contains one or more files that have been compressed, to reduce file size, or stored as is. The ZIP file format is a data compression and archive format.

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