×

Data processing system having a resume function and an operating method thereof

DC
  • US 5,430,867 A
  • Filed: 05/23/1994
  • Issued: 07/04/1995
  • Est. Priority Date: 04/28/1989
  • Status: Expired due to Term
First Claim
Patent Images

1. A data processing system having a resume function and a security managing function, comprising:

  • switch means for switching on and off a main power of said data processing system;

    switch detection means, coupled to said switch means, for detecting that said switch means has switched on or off said main power;

    memory means, coupled to said switch detection means, and responsive to a detection result of said switch detection means, for storing contents of data processing immediately before the main power is turned off;

    holding means for holding identification data;

    input means for inputting identification data for security management;

    discriminating means, coupled to said switch detection means, said holding means, and said input means, said discriminating means being responsive to said switch detection means, for discriminating whether identification data input from said input means after said switch means has switched on said main power coincides with identification data held in said holding means;

    executing means for, in response to detection of a coincidence by said discriminating means, executing data processing, from processing executed immediately before the main power was switched off, in accordance with a storage content of said memory means; and

    means for inhibiting a resumption of the data processing, to prevent contents of the data processing from being revealed to an unauthorized person, in response to detection of a non-coincidence by said discriminating means.

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