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This approach ensures that even if two chunks have the same content, their respective ciphertexts will be different due to the unique nonces used during encryption. The nonce for each chunk is derived by XORing the master nonce with the chunk index. The resulting hash value is used as input to the PBKDF2 function.Ĭipherator uses the derived 256-bit key for encrypting all chunks of the file, while employing a unique nonce for each chunk to ensure maximum security. When a keyfile is specified, the first 1MiB of the keyfile is read, and its data is hashed using SHA256 along with the password (if any).

Authentication tag for each chunk, generated during encryption, is appended to its correspoding encrypted chunk.Ĭipherator employs PBKDF2 with HMAC-SHA256 and a configurable number of iterations (Default: 100,000, Minimum: 10,000) to derive a 256-bit key from the provided password and/or keyfile.

When a file is encrypted, the following data is stored in the output file:

-n : Number of iterations for PBKDF2 (optional).

If the path value is empty, it will be requested.

If the password value is empty, it will be requested.