Method and System for Mixed Symmetric and Asymmetric Decryption of .ZIP Files
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Abstract
The present invention provides a method of integrating existing strong encryption methods into the processing of a .ZIP file to provide a highly secure data container which provides flexibility in the use of symmetric and asymmetric encryption technology. The present invention adapts the well established .ZIP file format to support higher levels of security and multiple methods of data encryption and key management, thereby producing a highly secure and flexible digital container for electronically storing and transferring confidential data.
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Citations
155 Claims
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1-138. -138. (canceled)
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139. A method for providing access to data in a .Zip file format data container, said method including:
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receiving a data container constructed in accordance with a .Zip file format, said data container including; symmetric key data; asymmetric key data, wherein said symmetric key data and said asymmetric key data are stored in the central directory of said .Zip file format data container; and an encrypted data file; providing the options of; (a) receiving an asymmetric key input, and using said asymmetric key data in combination with said asymmetric key input to obtain a symmetric key to symmetrically decrypt said encrypted data file to form a decrypted data file; and (b) receiving a symmetric key input, and using said symmetric key data in combination with said symmetric key input to obtain a symmetric key to symmetrically decrypt said encrypted data file to form a decrypted data file; and providing access to said decrypted data file. - View Dependent Claims (140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155)
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Specification