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Home -> Our Services -> Cryptography -> DH

DH Key Agreement Method

  • Technology Overview

DH Key Agreement Method is a key agreement algorithm used to enable two users to agree upon a key securely that can then be used for subsequent encryption of messages. The security of this algorithm lies on the difficulty of computing discrete logarithm.

  • Product Features

    • Compatible with "RFC-2631", Diffie-Hellman Key Agreement Method, E.Rescorla, June 1999.
    • Supports domain parameters p and q of following sizes:
    p (bits) q (bits)
    512 - 2048 160 - 256
    • Supports Ephemeral - Static and Static - Static modes.
    • APIs for Public Key generation, Shared Secret generation and Key Encryption Key (KEK) generation.
    • Optional APIs for pq validation, g validation and Public Key validation.
    • Flexible interface with 'C' callability.
    • Easily portable to other architectures.
    • The code is interruptible and fully re-entrant. It can be used in systems with multi-threaded software architecture.

  • Processor

    • ARM-7TDMI with 8KB unified cache and 64 MHz clock.

  • Performance

    • Memory Requirements
    ROM(Bytes)RAM(Bytes)
    Code Table Data Stack
    10200 512 0 2548
    • Timings
    Size of p (bits)Size of q (bits)Public Key generation (msec)Shared Secret generation (msec)
    		KEK generation (msec)
    		PQ validation (msec)G validation (msec)
    		Public Key validation (msec)
    512
    		160 90
    		80 30 230 90 90
    768 160 170 170 30
    		730 170 170
    1024 160 280 280 10 1710 280 280
    1077 224 440 420 40 2000 450 440
    1536 191 710 700 10 5480 730 740
    2048 256 1610 1590 30 13080 1660 1660