Computer security(5): Symmetric Encryption and Message Confidentiality-Part 1

CFN

Computer security(5): Symmetric Encryption and Message Confidentiality-Part 1

DES

Computer security(5): Symmetric Encryption and Message Confidentiality-Part 1

3 DES

Computer security(5): Symmetric Encryption and Message Confidentiality-Part 1
Computer security(5): Symmetric Encryption and Message Confidentiality-Part 1

AES

Computer security(5): Symmetric Encryption and Message Confidentiality-Part 1
Computer security(5): Symmetric Encryption and Message Confidentiality-Part 1
Computer security(5): Symmetric Encryption and Message Confidentiality-Part 1

Use the S-box and inverse S-box to calculate

Computer security(5): Symmetric Encryption and Message Confidentiality-Part 1
Computer security(5): Symmetric Encryption and Message Confidentiality-Part 1

The row rule of this cipher method

Computer security(5): Symmetric Encryption and Message Confidentiality-Part 1

The column of this cipher method

Computer security(5): Symmetric Encryption and Message Confidentiality-Part 1

Final step

Computer security(5): Symmetric Encryption and Message Confidentiality-Part 1

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