Advanced Encryption Standard (AES)

AES - Key Lengths

• 128 bits
• 192 bits
• 256 bits

AES - Modes of Operation

• modes of operation

AES - Example Encryption & Decryption

requires: openssl

AES-192 encrypt decrypt

CBC MODE

1. Encryption

   openssl aes-192-cbc -in attack-plan.txt -out message.enc

2. Decryption

   openssl aes-192-cbc -d -in message.enc -out plain-text.txt

ECB MODE

1. Encryption

   openssl aes-192-ebc -in attack-plan.txt -out message.enc

2. Decryption

   openssl aes-192-ebc -d -in message.enc -out plain-text.txt

AES-128 encrypt decrypt

CBC MODE

1. Encryption

   openssl aes-128-cbc -in attack-plan.txt -out message.enc

2. Decryption

   openssl aes-128-cbc -d -in message.enc -out plain-text.txt

ECB MODE

1. Encryption

   openssl aes-128-ecb -in attack-plan.txt -out message.enc

2. Decryption

   openssl aes-128-ecb -d -in message.enc -out plain-text.txt

AES-256 encrypt decrypt

CBC MODE

1. Encryption

   openssl aes-256-cbc -in attack-plan.txt -out message.enc

2. Decryption

   openssl aes-256-cbc -d -in message.enc -out plain-text.txt

ECB MODE

1. Encryption

   openssl aes-256-ecb -in attack-plan.txt -out message.enc

2. Decryption

   openssl aes-256-ecb -d -in message.enc -out plain-text.txt