AES - Adavanced Encryption Standard by Adaptive Digital

Advanced Encryption Standard is a United States government standard algorithm for encrypting and decrypting data.

ADT AES C64x, C55x

FIPs – 197 AES Standard,

The Adaptive Digital Technologies AES Encryption and Decryption allow a Texas Instruments DSP application to Encrypt and Decrypt character data according to the FIPs – 197 AES Standard.

Each AES cipher has a 128-bit block size, with key sizes of 128, 192 and 256 bits, respectively. The AES ciphers have been analyzed extensively and are now used worldwide. AES is one of the most popular algorithms used in symmetric key cryptography.

Data sheet .pdf

FEATURES

Encryption Algorithm Types: AES - CM, AES - F8, AES - CBC
Functions are C-callable.
Multi–Channel Implementation.

AVAILABILITY

ADT AES is available on the TMS320™ DSP Family

C64x/C64x+™ & C55x™ DSP Generations

SPECIFICATIONS

C55x
CYCLE COUNT *

Key Length	Encryption	Decryption
128 bits	7562	9091
192 bits	9052	11221
256 bits	10618	13072

Bits / sec	Encryption MIPS*	Decryption MIPS*
128 bit KeyLength	0.48	0.62
192 bit KeyLength	0.57	0.70
256 bit KeyLength	0.67	0.82

NOTE: * To calculate MIPS we use as an example, G729AB. The bit rate for this vocoder is 8000 bits/sec. This means there are 63 blocks of 128 bits per sec. The Encryption MIPs at a Key Length of 128 is 63 * 7562/sec = 0.48 MIPS.

MEMORY SPECIFICATIONS

All Memory usage is given in units of byte.

Software	Program Memory	Tables	Channel Memory
Encryption/ Decryption	1486	4196	968
			968

C64x/64x+

CYCLE COUNT *

Key Length	Encryption	Decryption
128 bits	2600	2500
192 bits	3100	3000
256 bits	3600	3500

Bits / sec	Encryption MIPS*	Decryption MIPS*
128 bit KeyLength	0.17	0.16
192 bit KeyLength	0.20	0.19
256 bit KeyLength	0.23	0.22

Note:* To calculate MIPS we use as an example, G729AB. The bit rate for this vocoder is 8000 bits/sec. This means there are 63 blocks of 128 bits per sec. The Encryption MIPs at a Key Length of 128 is 63 * 2600/sec = 0.17 MIPS.

MEMORY SPECIFICATIONS

All Memory usage is given in units of byte.

Software	Program Memory	Tables	Channel Memory
Encryption/ Decryption	5064	2104	488
			488

FUNCTION

AES_ADT_ChanInst_t ChannelEncrypt; // Allocate Encryption channel space
AES_ADT_ChanInst_t ChannelDecrypt; // Allocate Decryption channel space

TERMINOLOGY

AES CM - Advanced Encryption Standard counter mode

AES-f8 - AES in f8-mode, Universal Mobile Telecommunications System (UMTS) 3G mobile networks
use AES-f8.

AES CBC - Advanced Encryption Standard Cipher-block chaining