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Data encryption security module

  • US 5,999,629 A
  • Filed: 10/31/1995
  • Issued: 12/07/1999
  • Est. Priority Date: 10/31/1995
  • Status: Expired due to Term
First Claim
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1. An information delivery system comprisingan access control system,an information protection system, anda plurality of subscriber terminals, wherein said access control system, said information protection system and said plurality of subscriber terminals each include a security module formed on an integrated circuit chip, said security module comprisinggenerator comprising means, responsive to receipt of particular stimuli via an input terminal, for generating at least a unique serial number (Sid) that is thereafter directly used to uniquely identify the security module and for generating a public key (KPid) as a function of said unique serial number, said generator further comprising;

  • means for generating a symmetrical encryption key as a function of said unique serial number and a public key associated with and generated by another security module,means, responsive to receipt of an encrypted program encryption key from said other security module for decrypting said encrypted program encryption key using said symmetrical key,means for generating a device unique key (Slocal) and said program encryption key, andmeans for encrypting at least said serial number and said program encryption key using said device unique key and storing the encrypted results in memory internal to the integrated circuit.

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