Software usage authorization system with key for decrypting/re-encrypting/re-transmitting moving target security codes from protected software
September 5, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3806882 Portable securities selector system Computer software security system Microprocessor for executing enciphered programs Security system for data processing Crypto microprocessor for executing enciphered programs Computer terminal security system Cryptographic decoder for computer programs Apparatus and method for preventing unauthorized use of computer programs Crypto microprocessor that executes enciphered programs InventorAssigneeApplicationNo. 06/842552 filed on 03/21/1986US Classes:726/33, Copy inactivation340/5.74, Access to electrical information705/55Requiring a supplemental attachment or input (e.g., dongle) to openExaminersPrimary: Williams, Archie E. Jr.Assistant: Mohamed, Ayni Attorney, Agent or FirmInternational ClassG06F 21/00 (20060101)AbstractA computer based function control system is particularly suited for use as a software security device on the highly popular personal computers or a micro-processor driven function. The system includes an encrypted security message uniquely encoded at predetermined locations within the software or function program. The software or function program includes pre-set errors in it to cause failure of execution of the function or software program unless the errors are nulled during operation of the function or software program. A separate electronic key for retrieving, recognizing, decrypting, encrypting, and producing the null signals is connected to the communications port of the computer from which the key draws its power as well as the security message passed from the computer to the key and back to the computer. There is interchange of moving target and validation information between the computer software and the electronic key. This information is transferred via the security message under the cover of encryption and is monitored by the key and the software to insure that operation of the program can be effected only by authorized users of the function or software program (that is those having the key uniquely associated with that program).Other References
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