MOD5234-100IR NetBurner Inc, MOD5234-100IR Datasheet - Page 615

• Manufacturer Part Number: MOD5234-100IR
• Description: MOD5234 10/100 ETHERNET MODULE
• Manufacturer: NetBurner Inc
• Type: Controllers & Processorsr

Specifications of MOD5234-100IR

• Interface: I²C, SPI, UART
• Voltage - Supply: 2.5V
• Mounting Type: Surface Mount
• Package / Case: Module
• Product: Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Format: -
• Baud Rates: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q4483564

30.1.2.2 Advanced Encryption Standard (AES) Algorithm
In AES mode, SKHA is used to accelerate bulk data encryption/decryption in compliance with the
advanced encryption standard algorithm (AESA) Rinjdael. AES executes on 128-bit blocks with
128-bit key size.
AES is a symmetric key algorithm, the sender and receiver use the same key for both encryption
and decryption. The session key and initialization vector (CBC mode) are supplied to the SKHA
module prior to encryption. The processor supplies data to the module that is processed as 128-bit
input. The SKHA engine performs ten rounds for encryption or decryption. AES operates in ECB,
CBC, and CTR modes.
30.1.2.3 Electronic Code Book (ECB) Cipher Mode
The simplest mode is ECB. Each block is processed independently, as shown in
is no context used in this mode. Each block of plaintext is encrypted to determine the
corresponding ciphertext. In decrypt mode, the ciphertext blocks are decrypted to restore the
plaintext.
Freescale Semiconductor
block n
64-bit
128-bit
block n
Plaintext blocks
block n-1
128-bit
Figure 30-2. Triple-DES Encryption Process (ECB Mode)
Plaintext blocks
block 1
64-bit
...
block 2
128-bit
Figure 30-3. AES Encryption Process
64-bit K
MCF5235 Reference Manual, Rev. 2
DES
block 1
128-bit
1
1
128-bit key
64-bit K
DES
AES
2
2
64-bit K
DES
128-bit
block n
3
3
block n-1
Ciphertext blocks
128-bit
block n
64-bit
...
Ciphertext blocks
block 2
128-bit
Figure
block 1
128-bit
block 1
30-4. There
64-bit
Introduction
30-3