GoBinPad - A One-Time Pad Encryption Tool in Go

A lightweight, secure, and deterministic one-time pad encryption tool written in Go.

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About

GoBinPad is a command-line utility that provides strong encryption using a one-time pad (OTP). This tool was inspired by PixelPad and extends the idea to a Go-based implementation, allowing users to securely encrypt and decrypt files with a truly unbreakable cipher—when used correctly.

• Fisher-Yates shuffle of the OTP for additional security.
• ASCII mode for preserving printable characters.
• Flexible OTP sources – The OTP can be any file, such as an image, video, or random binary data.

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Installation

Using go install

If you have Go installed, you can install GoBinPad directly from the repository:

go install github.com/sarange/GoBinPad@latest

This will install gobinpad in your $GOPATH/bin directory, allowing you to run it globally.

From Source

Alternatively, you can build GoBinPad manually:

git clone https://github.com/sarange/GoBinPad.git
cd GoBinPad
go build

You can now run ./gobinpad from the current directory.

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Usage

GoBinPad operates via the command line and provides encryption and decryption functionality.

Encrypt a File

gobinpad encrypt -i input.txt -p otp.bin -o encrypted.bin

This encrypts input.txt using the OTP file otp.bin and saves the output as encrypted.bin.

Decrypt a File

gobinpad decrypt -i encrypted.bin -p otp.bin -o decrypted.txt

This reverses the encryption and restores the original file.

Encrypt in ASCII Mode

gobinpad encrypt -i input.txt -p otp.bin -o encrypted_ascii.txt --ascii

This ensures that encrypted output remains within the printable ASCII range.

Decrypt in ASCII Mode

gobinpad decrypt -i encrypted_ascii.txt -p otp.bin -o decrypted.txt --ascii

Output to Terminal Instead of a File

gobinpad encrypt -i input.txt -p otp.bin --ascii --stdout

Important Security Notice

If the OTP is compromised, the encrypted message is no longer secure.

• The security of the one-time pad relies entirely on the secrecy and randomness of the OTP.
• Never reuse an OTP – each encryption must have a unique OTP file.
• Your OTP can be any file, such as images, videos, or random binary data, but it must be statistically unpredictable and at least as long as the input file.
• If an attacker gains access to both the encrypted message and the OTP, they can decrypt it instantly.

License

GoBinPad is licensed under the GNU General Public License v3.0 (GPL-3.0).
See the LICENSE file for more details.

Acknowledgments

Inspired by PixelPad.