Method and apparatus for enabling trial period use of software products: method and apparatus for utilizing a decryption stub
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United States of America Patent
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-
Apr 7, 1998
Grant Date -
N/A
app pub date -
Aug 2, 1996
filing date -
Apr 25, 1994
priority date (Note) -
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Abstract
A method and apparatus is provided in a data processing system for securing access to particular files which are stored in a computer-accessible memory media. A file management program is provided as an operating system component of the data processing system. At least one encrypted file and at least one unencrypted file are stored in the computer-accessible memory media. An unencrypted security stub is associated with each of the encrypted files. The security stub is at least partially composed of executable code. The file management program is utilized to monitor data processing calls for a called file stored in the computer-accessible memory media. The file management program determines what the called file has an associated unencrypted security stub. The called file is processed in a particular manner dependent upon whether or not the called file has an associated unencrypted security stub.
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