Patents Assigned to Martin E. Hellman
  • Method and apparatus for use in public-key data encryption system
    Patent number: 4633036
    Abstract: In an encryption scheme based on the use of a public key having secret factors p and q, additional requirements on p and q are invoked in order to ensure a high level of security. In particular, it is additionally required that a value p+1 have a large prime factor r and that the value r-1 also have a large prime factor r'.
    Type: Grant
    Filed: May 31, 1984
    Date of Patent: December 30, 1986
    Assignee: Martin E. Hellman
    Inventors: Martin E. Hellman, Carl E. Bach