Method and system for multiple symmetric decryption of .ZIP files
a technology of symmetric decryption and zip files, applied in the field of multiple symmetric decryption of zip files, can solve the problems of weak data encryption, insufficient security for computer users, weak data encryption may not provide sufficient security to computer users, etc., and achieves high security, flexibility in use, and high security and flexibility.
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[0026] Referring now to the drawings, FIG. 1 shows the file format for the standard .ZIP file, in existence prior to the present invention. FIG. 2 illustrates the preferred general record layout of a .ZIP file in accordance with the present invention.
[0027] The newly modified .ZIP file format specification according to the present invention, as published by PKWARE, Inc., is described in a document entitled APPNOTE.TXT, which is attached hereto and incorporated herein by reference. The new version of the .ZIP file format provides an implementation of the use of strong encryption based on a key generated using a password. This implementation constitutes one example of a structure and layout of the records and fields suitable for processing secure .ZIP files as defined by the present invention. The complete description of the conventional or standard .ZIP file format will not be included here since this information is generally well known. Only the portions pertaining to the new recor...
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