Data center for remote postage meter recharging system having physically secure encrypting apparatus and employing encrypted seed number signals
Remote postage meter systems having variable user authorization code
Authentication system for digital cellular communications
Method and apparatus for authenication and protection of subscribers in telecommunication systems
Rolling key resynchronization in cellular verification and validation system
Method of carrying out an authentication check between a base station and a mobile station in a mobile radio system
Arrangement for detecting fraudulently identified mobile stations in a cellular mobile telecommunications network
Method and system for multimedia access control enablement
ApplicationNo. 730388 filed on 10/15/1996
US Classes:455/410, Security or fraud prevention340/5.74, Access to electrical information455/411, Privacy, lock-out, or authentication455/435.1Registration
ExaminersPrimary: Wolfe, Willis R.
Assistant: Vo, Hieu T.
Attorney, Agent or Firm
International ClassesH04Q 001/39
AbstractThis invention relates to a cellular telecommunications systems that utilizes the telephone number the cellular telephone is calling, with the number of telephone calls placed on that cellular telephone, i.e., call count and a seed number to create a digital certificate of the data. The digital certificate is used to make it more difficult to make unauthorized cellular telephone calls. The seed number may be changed after a predetermined number of calls has been made, i.e. one hundred, one thousand, etc. Thus, the transmission of seed numbers between data centers would be substantially reduced.