SecurByte

SecurByte 1.1 is a lightweight command-line tool for encrypting and decrypting files using AES-256-CBC.

Usage

SecurByte [--encrypt-file/-ef | --decrypt-file/-df <filepath>] [--passwd/-p <password>] [--nobanner/-n] [--help/-h]

Options

• -ef, --encrypt-file <filepath> → Encrypts the specified file.
• -df, --decrypt-file <filepath> → Decrypts the specified file.
• -p, --passwd <password> → Specifies the password for encryption/decryption.
• -n, --nobanner → Suppresses the startup banner.
• -h, --help → Displays the help message.

Download exe for Windows

This tool is part of the 8gudbitsKit project. To download the executable for Windows, visit the 8gudbitsKit repository.

For the Tech People

Encryption Process

• Reads the file and applies PKCS7 padding.
• Hashes the password using SHA-256 to derive the encryption key.
• Generates a random IV and encrypts the data using AES-256-CBC.
• Prepends the "securbyte_1.1" header to the encrypted output.
• Saves the encrypted file.

Note: The reason for prepending the "securbyte_1.1" header is to identify the file as a SecurByte-encrypted file. This is useful for future compatibility and to ensure that the file can be decrypted using the same version of the tool or a compatible version. This also helps to understand if the correct password is being used for decryption.

Decryption Process

• Reads the file and verifies the "securbyte_1.1" header.
• Extracts the IV and decrypts the data using AES-256-CBC.
• Removes PKCS7 padding.
• Saves the decrypted file.

Note: If the header is missing or incorrect, the tool warns that the file may not have been encrypted using SecurByte or has been modified.