About

Encrypt or decrypt files using a Trezor hardware wallet.

By design, a decrypt operation requires a confirmation on the device. Unlike an encrypted partition, the user can have some assurance that the data remains encrypted unless needed.

Trez can add convenience and security, however, this is Beta software so you should only use Trez on a secondary copy of your data. Here are some use cases:

• Create cold-storage backups
• Use trez files to copy data to and from cold storage (keeping the USB clean).
• Keep encrypted partitions locked more often by extract commonly use data into Trez files.

Usage

$ npm install -g trez

$ trez -?

Trez - File encryption program making use of Trezor hardware wallet security.


Options:
  --clipboard-save, -s  Save next clipboard copy to an encrypted file (clears
                        the clipboard).                                 [string]
  --clipboard-load, -l  Load the clipboard with decrypted data.         [string]
  --force               Force overwrite file                           [boolean]
  --help, -h, -?        Show help                                      [boolean]

Examples:
  trez --clipboard-save [myfile.txt.trez, omit to generate filename]
  trez --clipboard-load myfile.txt.trez
  trez myfile.txt                           Encrypt to myfile.txt.trez
  trez myfile.txt.trez                      Decrypt to myfile.txt
  trez myfile.txt.trez -                    Decrypt to standard out
  trez myfile.txt.trez /safe/myfile.txt     Decrypt

Trez file format

The Trez format is JSON followed by binary data. Trez files use a 256 bit encrypted secret to unlock the larger dataset. This lends itself to better device performance and quick validation.

Please keep in mind the following safety design decisions were made. Make sure you understand any potential privacy issues:

• It is easy to identify a Trez file by looking at the data
• The Trezor's device label is saved in plain text in the trez file (this label is required to decrypt).
• The Trezor confirmation message is saved in plain text in the trez file (this phrase is required to decrypt).
• A device confirmation to decrypt is used. However, a confirmation to encrypted is not used.

Requirements

• Clipboard (optional) - The copy-paste package will expect one of these prgrams: "pbcopy/pbpaste (for OSX), xclip (for Linux and OpenBSD), and clip (for Windows). Currently works with node.js v0.8+."

Environment

Node 6+