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Cryptography
DES Encryption / Decryption
DES Encryption / Decryption
- Technology Overview
Data Encryption Standard (DES) is a symmetric key algorithm. DES is designed to encrypt and decrypt
blocks of data (multiple of 64 bits) using a 64-bit private key. Its security is based on the secure
private key. Messages are encrypted and decrypted using the same private key.
- Product Features
-
Compatible with "Data Encryption Standard (DES)", FIPS PUB46-3, Federal Information Processing
Standards Publication, Reaffirmed, 1999 October 25.
- Supports ECB and CBC modes.
- APIs for key schedule, 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
| ROM(Bytes) |
RAM(Bytes) |
| Code |
Table |
Data |
Stack |
| 3948 |
4704 |
128 |
88 |
- Timings
| Key Generation (usec) |
Encryption (usec) |
Decryption (usec) |
| 44 - 64 |
48 - 72 |
44 - 60 |
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