Patents Assigned to CMLA, LLC
  • Exponential data transform to enhance security
    Patent number: 8737608
    Abstract: A data input is divided into two segments. The second segment is raised to a power of a function of the first segment, the power being relatively prime to a function of a predefined modulus. The modulus is then applied to the result. The transformed data is assembled from the first segment and the remainder modulo the modulus. This data transformation can be applied in combination with a key derivation algorithm, a key wrapping algorithm, or an encryption algorithm to enhance the security of these other applications.
    Type: Grant
    Filed: March 2, 2012
    Date of Patent: May 27, 2014
    Assignee: CMLA, LLC
    Inventors: Ivan Bjerre Damgaard, Torben Pryds Pedersen, Vincent Rijmen
  • KEY DERIVATION FUNCTIONS TO ENHANCE SECURITY
    Publication number: 20120163591
    Abstract: A data input is divided into two segments. The second segment is raised to a power of a function of the first segment, the power being relatively prime to a function of a predefined modulus. The modulus is then applied to the result. The transformed data is assembled from the first segment and the remainder modulo the modulus. This data transformation can be applied in combination with a key derivation algorithm, a key wrapping algorithm, or an encryption algorithm to enhance the security of these other applications.
    Type: Application
    Filed: March 2, 2012
    Publication date: June 28, 2012
    Applicant: CMLA, LLC
    Inventors: Ivan Bjerre Damgaard, Torben Pryds Pedersen, Vincent Rijmen
  • Key derivation functions to enhance security
    Patent number: 8155310
    Abstract: Key derivation algorithms are disclosed. In one key derivation application, a segment of the master key is hashed. Two numbers of derived from another segment of the master key. A universal hash function, using the two numbers, is applied to the result of the hash, from which bits are selected as the derived key. In another embodiment, an encoded counter is combined with segments of the master key. The result is then hashed, from which bits are selected as the derived key.
    Type: Grant
    Filed: June 25, 2009
    Date of Patent: April 10, 2012
    Assignee: CMLA, LLC
    Inventors: Ivan Bjerre Damgaard, Torben Pryds Pedersen, Vincent Rijmen
  • Permutation data transform to enhance security
    Patent number: 8077861
    Abstract: A data input is divided into two segments; the second segment is also divided into groups. Bits in the first segment are used to control the application of permutation functions to bit groups in the second segment. The transformed data is assembled from the first segment and the permuted groups of the second segment. This data transformation can be applied in combination with a key derivation algorithm, a key wrapping algorithm, or an encryption algorithm to enhance the security of these other applications.
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: December 13, 2011
    Assignee: CMLA, LLC
    Inventors: Ivan Bjerre Damgaard, Torben Pryds Pedersen, Vincent Rijmen
  • Key derivation functions to enhance security
    Patent number: 7577250
    Abstract: Key derivation algorithms are disclosed. In one key derivation application, a segment of the master key is hashed. Two numbers of derived from another segment of the master key. A universal hash function, using the two numbers, is applied to the result of the hash, from which bits are selected as the derived key. In another embodiment, an encoded counter is combined with segments of the master key. The result is then hashed, from which bits are selected as the derived key.
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: August 18, 2009
    Assignee: CMLA, LLC
    Inventors: Ivan Bjerre Damgaard, Torben Pryds Pedersen, Vincent Rijmen
  • Exponential data transform to enhance security
    Patent number: 7564970
    Abstract: A data input is divided into two segments. The second segment is raised to a power of a function of the first segment, the power being relatively prime to a function of a predefined modulus. The modulus is then applied to the result. The transformed data is assembled from the first segment and the remainder modulo the modulus. This data transformation can be applied in combination with a key derivation algorithm, a key wrapping algorithm, or an encryption algorithm to enhance the security of these other applications.
    Type: Grant
    Filed: August 12, 2004
    Date of Patent: July 21, 2009
    Assignee: CMLA, LLC
    Inventors: Ivan Bjerre Damgaard, Torben Pryds Pedersen, Vincent Rijmen