GnuPG unter Mac OS X
GnuPG (auch GPG oder GNU Privacy Guard) ist eine Implementierung des OpenPGP-Standards (RFC 4880) und eine Alternative zum bekannten PGP (Pretty Good Privacy). Es dient zum verschlüsseln und signieren von Daten, um ihre Vertraulichkeit bzw. Authentizität und Integrität sicherzustellen. Dabei wird ein öffentlicher Schlüssel (Public-Key) zum verschlüsseln der Daten verwendet und dieser kann auch den Kommunikationspartnern zur Verfügung gestellt werden. Daten die damit verschlüsselt wurden können anschließend nur noch mit dem privaten Schlüssel (Private-Key) wieder entschlüsselt werden.
Robert Sosinski hat in seinem Blog ein umfangreiches Tutorial zum Einsatz von Mac GPG veröffentlicht:
Installing the Software
PGP comes in many implementations, however the one you will be using in this tutorial is GPG (GNU Privacy Guard) as it follows the OpenPGP standard, is completely free and offers an easy to use Mac OS X installer.
[...]Generating a Key
Now that you have GPG installed, you will start generating your key pair and adding it to your key chain. All of this will be done through the shell, so open a terminal and get ready for some typing.
[...]Managing Your Keys
Now that you have a key pair, the next step is managing your keys properly. You will do this by sharing your public key with others and securely backing up your private key.
[...]Importing and Verifying Public Keys
Your public key is now available throughout the internet and people interested in sending you an encrypted message have easy access to it. The next step is to go through the motions of importing a public key and verifying its authenticity.
[...]Encrypting and Decrypting Messages
Now that you are setup and familiar with GPG, we can now start using it to encrypt and decrypt messages. In order to keep this part of the tutorial simple, you will only be sharing information with yourself. Once you get the hang of it, you can then start sending encrypted messages to any other PGP user.
[...]
Links:
Wikipedia – GNU Privacy Guard
Wikipedia – OpenPGP
Wikipedia – Pretty Good Privacy
RFC 4880 – OpenPGP Message Format
Robert Sosinski – Working with PGP and Mac OS X
Mac GNU Privacy Guard
