Method and apparatus to inhibit copying from a record carrier

Abstract

A technique to prevent illicit copying of a copy-protected CD-ROM into a computer-readable storage drive is presented. In accordance with the present invention, when an authentic copy-protected CD-ROM is inserted into a CD drive and the content of the copy-protected CD-ROM is installed onto a hard disk drive that is linked to the CD drive, the Central Processor Unit (CPU) executes the installer instructions residing in the CD-ROM to create a license file in the hard disk drive. For security reasons, the content of the CD-ROM (e.g., the executable file of the application) is encrypted. When the content of the CD-ROM is copied into the hard disk drive, it remains encrypted. The license file essentially acts as a timer to monitor a predetermined time interval that has been programmed into the license file. If a user attempts to launch the encrypted copied application residing in the hard drive at any time prior to the expiration of the predetermined time interval, the license file readily supplies the key code to enable a filter to decode the encrypted installed application thereby allowing the application to launch. At the expiration of the predetermined time interval, the license file withholds the key code therefore not allowing the installed application to be decrypted and successfully launched. The predetermined time interval can be reset by reinserting the copy-protected CD-ROM into the CD drive to reset the time interval.

Description

FIELD OF THE INVENTION [0001] The invention generally relates to copy protection and more particularly to a method to prevent illicit copying of software from record carriers to computer-readable data storage drives. BACKGROUND OF THE INVENTION [0002] Despite its compact size, each Compact Disc (CD) in its many forms (e.g., CD-ROM, CD-R, CD-RW, CD-DA, CD-I, etc.) can be used to store enormous amounts of data (i.e., 650 MB) including audio, text, software codes, graphics, etc. In addition, CDs are subject to no mechanical wear and tear and are therefore very reliable. As a result, CDs have become the preferred portable data storage format in recent years. Indeed, software products (e.g., application software, video games, etc.) are currently distributed by software publishers almost exclusively on CD-ROM format. However, it is estimated that software and video game publishers lose billions of dollars worldwide to product piracy each year. While most CD-ROM software piracy losses are ...

AI Technical Summary

Benefits of technology

[0006] Accordingly, the present invention provides an improved method to discourage illicit copying of a copy-protected CD-ROM into a computer-readable data storage device without requiring the copy-protected CD-ROM to be inserted in the CD-ROM drive to successfully launch the copied application from the data storage device.

[0007] The present invention meets the above need with a method to discourage illicit copying from a digital record carrier to a computer-readable data storage device. As part of the method, the content of the digital record carrier is encrypted. Next, determination is made as to whether a predetermined time interval has lapsed since the digital record carrier was last inserted for use. If the predetermined time interval has not lapsed, the content of the digital record carrier that has been installed onto the computer-readable data storage device is decrypted into a random access memory thereby allowing the copied content to launch for use. Otherwise, if the predetermined time interval has lapsed, the content of the digital record carrier that has been installed onto the computer-readable data storage device is prevented from being decrypted thereby not allowing the copied content to launch for use. Under the present invention, re-inserting the digital record carrier resets the predetermined time interval.

Problems solved by technology

Otherwise, if the predetermined time interval has lapsed, the content of the digital record carrier that has been installed onto the computer-readable data storage device is prevented from being decrypted thereby not allowing the copied content to launch for use.

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