×

Digital signature purpose encoding

  • US 6,199,053 B1
  • Filed: 04/08/1999
  • Issued: 03/06/2001
  • Est. Priority Date: 09/30/1996
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for generating an extended digital signature comprising:

  • producing an extended hash value based on a purpose description and a hash value of input data; and

    generating the extended digital signature using a digital signature function on the extended hash value.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×