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RSA Encryption / Decryption

• Technology Overview
RSA is an algorithm for public-key encryption. Its security is based on the difficulty of factoring large integers. RSA involves a public and private key. The public key can be known to everyone and is used for encrypting messages. Messages encrypted with the public key can only be decrypted using the private key.


• Product Features
• Supports key lengths of 512 to 2048 bits.
• APIs for key generation, encryption and decryption.
• 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

Key Length (Bits)	ROM (Bytes)		RAM (Bytes)
	Code	Table	Data	Stack
512	12772	256	516	1252
512 - 1024			1028	2604
1024 - 2048			2052	4524

• Timings

Key Length (bits)	Key Generation (msec)	Encryption (msec) e = 65537	Decryption (msec)
512	120	20	80
1024	640	40	450
2048	4070	100	3320

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