C8051F964-A-GQ Silicon Labs, C8051F964-A-GQ Datasheet - Page 190

• Manufacturer Part Number: C8051F964-A-GQ
• Description: 8-bit Microcontrollers - MCU 64KB DC-DC LCD AES
• Manufacturer: Silicon Labs

Specifications of C8051F964-A-GQ

• Rohs: yes
• Core: 8051
• Processor Series: C8051
• Data Bus Width: 8 bit
• Maximum Clock Frequency: 24.5 MHz
• Program Memory Size: 64 KB
• Data Ram Size: 8 KB
• On-chip Adc: Yes
• Operating Supply Voltage: 1.8 V to 3.8 V
• Operating Temperature Range: - 40 C to + 85 C
• Package / Case: QFP-80
• Mounting Style: SMD/SMT

C8051F96x
14.6. Block Cipher Modes
14.6.1. Cipher Block Chaining Mode
The Cipher Block Chaining (CBC) Mode algorithm significantly improves the strength of basic AES encryp-
tion by making each block encryption be a function of the previous block in addition to the current Plaintext
and key. This algorithm is shown inFigure 14.4
190
Encryption
Decryption
Initialization Vector (IV)
Initialization Vector (IV)
Encryption
Decryption
Figure 14.4. Cipher Block Chaining Mode
Key
Key
Cipher Text
Cipher Text
Plain Text
Encryption
Decryption
Plain Text
Cipher
Cipher
XOR
XOR
Rev. 0.5
Encryption
Decryption
Key
Key
Cipher Text
Encryption
Cipher Text
Decryption
Plain Text
Plain Text
Cipher
Cipher
XOR
XOR