Patents by Inventor Christopher I. Davies

Christopher I. Davies has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5394471
    Abstract: An improved method for password validation comprising the steps of identifying bad passwords having one or more characters; computing a frequency of occurrence of bad password characters; computing a probability of occurrence T of the bad password characters within the bad passwords based upon the computed frequency of occurrence; identifying a proposed password having one or more characters; and comparing the proposed password characters with the probability of occurrence T of the bad password characters. The method further comprises the steps of establishing a validation threshold and validating the proposed password based upon the correspondence between (i) a value, BAp, reflecting the relationship between the probability of occurrence T of bad password characters within bad passwords and the proposed password characters and (ii) an established validation threshold. A Markov model is use to compute the probability of occurrence. The present invention also includes an improved password validation system.
    Type: Grant
    Filed: September 17, 1993
    Date of Patent: February 28, 1995
    Assignee: Bell Atlantic Network Services, Inc.
    Inventors: Ravi Ganesan, Christopher I. Davies