Microchip Technology dsPIC33F Family Uživatelský manuál stáhnout pdf (Strana 56)

dsPIC33F

11.11 Symmetric Key Embedded

Encryption Library

Microchip offers a reliable security solution for

embedded applications built on the dsPIC33F platform.

This solution is provided by means of two libraries –

Symmetric Key and Asymmetric Key Embedded

Encryption Libraries. The Symmetric Key Library

includes the following:

• Hash functions

- SHA-1 Secure Hash Standard

- MD5 Message Digest

• Symmetric Key Encryption/Decryption functions

- Advanced Encryption Standard (AES)

- Triple Data Encryption Standard (Triple-DES)

• Random Number Generator functions

- Deterministic Random Bit Generator

ANSI X9.82

Some typical applications for this library include:

• Mobile and Wireless Devices, PDAs

• Secure Banking

• Secure Web Transactions

- Secure Socket Layer (SSL)

- Transport Layer Security (TLS)

- Secure Multipurpose Mail Extensions (S/MIME)

• ZigBee™ Technology and other Monitoring and

Control Applications

• Smart Card Readers/Trusted Card Readers

• Friend/Foe Identification

• Secure devices and peripherals interoperating

with TCG (Trusted Computing Group) and

NGSCB (Microsoft Next Generation Secure

Computing Base) personal computers

Key features of the Symmetric Key Embedded

Encryption Library include:

• C-callable library functions developed in MPLAB

ASM30 assembly language

• Optimized for speed, code size and RAM usage

- RAM usage below 60 bytes

• Library functions extensively tested for adherence

to applicable standards

• Symmetric Key Encryption/Decryption functions

support multiple modes of operation:

- Electronic Code Book (ECB) mode

- Cipher Block Chaining with Message

Authentication (CBC-MAC) mode

- Counter (CTR) mode

- Combined CBC-MAC and CTR (CCM) mode

• “dsPIC30F Embedded Encryption Libraries User’s

Guide”

• Several examples of use are provided for each

library function

11.12 Asymmetric Key Embedded

Encryption Library

Microchip offers a reliable security solution for

embedded applications built on the dsPIC33F platform.

This solution is provided by means of two libraries –

Symmetric Key and Asymmetric Key Embedded

Encryption Libraries. The Asymmetric Key Library

includes the following:

• Public Key Encryption/Decryption functions

- RSA (1024 and 2048-bit)

• Key Agreement Protocol

- Diffie-Hellman (1024 and 2048-bit)

• Signing and Verification

- DSA (1024-bit)