DSA: Digital Signature Algorithm

• Description

  This core is a fully compliant implementation of the Digital Signature Algorithm, as described in Federal Information Processing Standards Publication 186-2, dated 27 January 2000.

  The DSA core accepts input words in terms of 32 bits. It then generates or verifies signature depending upon the value of input port sig_gen_ver.

  The size of parameters used is - p is a prime modulus, where 2^L-1 < p < 2^L for 512 < L - q is a prime divisor of p - 1, where 2^159 < q < 2^160

  - g has order (q mod p)
  - x is such that 0 < x < q
  - y is g ^ x mod p
  - k is such that 0 < k < q

• Features of Implemented Core

  • Both signature generation and signature verification can be done by the same core.
  • SHA-1 is the inbulit core
  • Core available in synthesizable VHDL

• Core Facts