Patents by Inventor Frederic A. H. Duminy

Frederic A. H. Duminy 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).

  • Encrypting variable-length passwords to yield fixed-length encrypted passwords
    Patent number: 8284933
    Abstract: According to one embodiment, encrypting passwords includes performing the following for each input password of a plurality of input passwords to yield encrypted passwords, where at least two input passwords have different lengths and the encrypted passwords have the same length. An input password and a random number are received at logic configured to perform a key derivation operation comprising a pseudorandom function. An encryption key is derived from the input password and the random number according to the key derivation operation. The encryption key and a user identifier are received at logic configured to perform a cipher-based message authentication code (CMAC) function. An encrypted password is generated from the encryption key and the user identifier according to the CMAC function.
    Type: Grant
    Filed: March 19, 2009
    Date of Patent: October 9, 2012
    Assignee: CA, Inc.
    Inventors: Terry W. Chaisson, Adam S. Hendrix, Frederic A. H. Duminy
  • ENCRYPTING VARIABLE-LENGTH PASSWORDS TO YIELD FIXED-LENGTH ENCRYPTED PASSWORDS
    Publication number: 20100239087
    Abstract: According to one embodiment, encrypting passwords includes performing the following for each input password of a plurality of input passwords to yield encrypted passwords, where at least two input passwords have different lengths and the encrypted passwords have the same length. An input password and a random number are received at logic configured to perform a key derivation operation comprising a pseudorandom function. An encryption key is derived from the input password and the random number according to the key derivation operation. The encryption key and a user identifier are received at logic configured to perform a cipher-based message authentication code (CMAC) function. An encrypted password is generated from the encryption key and the user identifier according to the CMAC function.
    Type: Application
    Filed: March 19, 2009
    Publication date: September 23, 2010
    Applicant: Computer Associates Think, Inc.
    Inventors: Terry W. Chaisson, Adam S. Hendrix, Frederic A.H. Duminy