Microprocessor for executing enciphered programs
Method and apparatus for controlling usage of a programmable computing machine
Crypto microprocessor for executing enciphered programs
Computer accessing system
Cryptographic decoder for computer programs
Method and apparatus for providing security for computer software
Remote postage meter systems having variable user authorization code
System and method for authorizing access to an article distribution or service acquisition machine
Apparatus and method for preventing unauthorized use of computer programs
ApplicationNo. 292927 filed on 01/03/1989
US Classes:705/52, Usage or charge determination380/230, Including usage recording705/34, Bill preparation705/55Requiring a supplemental attachment or input (e.g., dongle) to open
ExaminersPrimary: Smith, Jerry
Assistant: Kibby, Steven G.
Attorney, Agent or Firm
International ClassH04L 009/00
AbstractA computer software security and billing system is disclosed in which the application program is enciphered in accordance with an algorithm driven by a numeric key. The user's computer is provided with a hardware security module and a removable billing module, both of which carry unique codes. A security program accesses the application program and also writes information about billing into the billing module. The billing module is periodically replaced so the user can be charged based on amount of usage of the software.