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Purse
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Clarify authentication vs encryption

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drduh 2019-01-30 18:24:02 -08:00
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Purse is a fork of [drduh/pwd.sh](https://github.com/drduh/pwd.sh).
Both programs are shell scripts which use [GPG](https://www.gnupg.org/) to manage passwords in an encrypted text file. Purse uses asymmetric (public-key) encryption, while pwd.sh uses symmetric (password) encryption.
Both programs are shell scripts which use [GPG](https://www.gnupg.org/) to manage passwords in an encrypted text file. Purse uses asymmetric (public-key) authentication, while pwd.sh uses symmetric (password-based) authentication.
While both are reasonably secure by using a trusted crypto implementation (GPG) and safe handling of password input, Purse eliminates the need to remember and use a master password - just plug in a YubiKey, enter the PIN, then touch it to decrypt the password safe to stdout.
While both scripts use a trusted crypto implementation (GPG) and safely handle passwords (never saving plaintext to disk), Purse eliminates the need to remember and use a master password - just plug in a YubiKey, enter the PIN, then touch it to decrypt the password safe to stdout.
By using GPG keys and a hardware token like YubiKey, the risk of master password phishing or keylogging is eliminated; only physical possession of the hardware token AND knowledge of the PIN can unlock the password safe.
By using Purse with YubiKey, the risk of master password phishing and keylogging is eliminated - only physical possession of the key AND knowledge of the PIN can unlock the password safe.
# Installation
This script requires an existing GPG key and is intended to be used with a YubiKey or similar hardware token for storing the private key. See [drduh/YubiKey-Guide](https://github.com/drduh/YubiKey-Guide) for instructions on setting one up.
This script requires a GPG identity - see [drduh/YubiKey-Guide](https://github.com/drduh/YubiKey-Guide) to set one up.
To install the script:
To install Purse:
```console
$ git clone https://github.com/drduh/Purse
```
Then modify it to use the preferred GPG key ID.
Edit `purse.sh` to specify your GPG key ID.
# Use