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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

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