Patents by Inventor Petrus Lambertus Adriaanus Roelse

Petrus Lambertus Adriaanus Roelse 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).

  • Substitution-box for symmetric-key ciphers
    Publication number: 20020027987
    Abstract: An input data block is cryptographically converted into an output data block; by performing a non-linear operation on the input data block using an S-box based on permutations. The S-box is associated with a set of at least two permutations. Each time before the S-box is used, one of the permutations is (pseudo-)randomly selected from the set of permutations and used for the conversion.
    Type: Application
    Filed: June 29, 2001
    Publication date: March 7, 2002
    Inventor: Petrus Lambertus Adriaanus Roelse