Adiatron

Adiatron is a command-line tool for encrypting and decrypting files of any size. It uses public-key cryptography for secure key exchange and authenticated streaming encryption to process large files with constant memory usage.

TODO

• Keys selection(TUI)
• Select usb drive for keys
• Progress bar
• Keys passphrase support
• --version flag

How it works

1. A random symmetric stream key is generated
2. The stream key is encrypted using the recipient's public key
3. File data is encrypted in chunks using authenticated streaming encryption
4. Each chunk is verified during decryption to prevent tampering

Here is an encrypted file structure:

[ box_nonce ][ boxed_stream_key ][ secretstream_header ][ encrypted chunks... ]

Installation

Dependencies

• libsodium
• cmake
• tar(optional)

Build

./build.sh

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Usage

To encrypt files:

./adiatron encrypt file.mp4

To decrypt files:

./adiatron decrypt file.mp4.enc

Type ./adiatron to display all examples and options.

Note

See Tips and Issues section for more information.

How public-key exchange works

1. Sender (Alice) generates a key pair and sends her public key to the receiver.
2. Receiver (Bob) generates a key pair and sends his public key to the sender.
3. Now:
   • Alice encrypts messages using Bob's public key + her secret key.
   • Bob decrypts messages using Alice's public key + his secret key.

Tips and Issues

Tip

Keys are automatically generated during file encryption or decryption.
However, you can generate keys in advance by using the command:

./adiatron keygen

Tip

You can create a short alias by adding this line to your shell configuration file(e.g., ~/.bashrc or ~/.zshrc):

alias adiatron=/path/to/adiatron

License

This project is licensed under MIT