×

Electronic data-processing device and system

  • US 6,182,217 B1
  • Filed: 09/03/1999
  • Issued: 01/30/2001
  • Est. Priority Date: 03/03/1997
  • Status: Expired due to Term
First Claim
Patent Images

1. An integrated electronic data-processing device, comprising:

  • at least one memory storing at least one secret key in encoded form, a processing unit, and a bus connecting said processing unit to said at least one memory;

    an encryption and decryption unit connected to said processing unit;

    a comparator connected between said at least one memory and said encryption and decryption unit for comparing the stored secret key with a keyword input by a user;

    a switching unit connected to and driven by said comparator, said switching unit driving said encryption unit and selectively enabling data to be stored to be encrypted and stored data to be decrypted only upon a positive comparison in said comparator; and

    said switching unit passing the keyword input by the user through to said encryption unit for encryption and decryption.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×