secure

Overview

secure is a CLI tool that enables sending files securly over an insecure connection (i.e. Slack). It's using public ssh-key for encrypting files and allows decryption using private key.

Usage

To get help at any time for the tool or any command you can run:

secret --help            # help pertaining to the tool itself
secret encrypt --help    # help pertaining to the encrypt command
secret decrypt --help    # help pertaining to the decrypt command

Encrypt

secure encrypt --file my_secret_file.txt --publicKey recipient_key.pub

Files to send to recipient.

Filename	Purpose
secret.txt.enc	Encrypted file containing secret
secret.key.enc	Encrypted symmetric key

Decrypt

secure decrypt --file secret.txt.enc --secretKey secret.key.enc

Filename	Purpose
secret.txt	Unencrypted file from sender

Technical overview

1. Generating 32 bit symmetric key.
2. Encrypt file to transfer with the symmetric key.
3. Encrypt the symmetric key using recipients public ssh-key.