AES-128 ECB encryption is a fast and robust encryption mode for file processing, as it handles each data block independently while using a 128-bit symmetric key.
This key ensures a high level of security by making brute-force attempts difficult, while also offering excellent speed and efficiency due to its simplicity of implementation. This makes it suitable for situations requiring a good balance between performance and security.
We chose to use a 128-bit key instead of a 256-bit key to optimize performance.
First, we need a secret key to encrypt and decrypt all the data.
The key is a 16-byte array ( == 128 bits ), which serves as the foundation of our encryption/decryption system.
We generate this key securely to ensure confidentiality.
Once generated, this key must be stored securely and never exposed in an unsecured environment.
Then, we encrypt all the data using the secret key.
To encrypt the data, we split the input into 16-byte chunks.
This ensures that encryption is processed efficiently and aligns with the block size.
We assume the input data has been compressed beforehand, ensuring that the file size is a multiple of 16 bytes.
Each chunk is processed individually using the encryption algorithm, securing the entire dataset.
I am a container inside another container.
Additional encrypted content appears upon zoom.
At runtime, we decrypt the encrypted data to retrieve the original content.
The decryption process is essentially the reverse of encryption.
Each encrypted 16-byte chunk is decrypted using the same secret key.
Once all chunks are decrypted, the original data is restored and ready for use.
I am a container inside another container.
Additional decrypted content appears upon zoom.