Introduction to PGP

In this talk we're going to have a look at encryption with PGP, its most common use cases, securing our online presence with public keys and a lot more.
If you already have a key and would like to have it signed, bring it.

Transcript

1. Introduction to PGP Carlos León Skelleftech 23-Jan-2023 Skellefteå, Sweden
2. Cloud Native Specialist @ CoreX Social Media: - mastodon: @mongrelion@fosstodon.org - Twitter: @mongrelion - LinkedIn: https://www.linkedin.com/in/mongrelion/ - carlos@corex.co
3. Let’s cover the basics
4. The problem
5. Ana Erik
6. Julius Caesar’s Cipher When Julius Caesar sent messages to his generals, he didn't trust his messengers. So he replaced every A in his messages with a D, every B with an E, and so on through the alphabet. Only someone who knew the "shift by 3" rule could decipher his messages. So starting with ABCDEFGHIJKLMNOPQRSTUVWXYZ and sliding everything up by 3, you get DEFGHIJKLMNOPQRSTUVWXYZABC where D=A, E=B, F=C, and so on. The key here is 3.
7. Public Key Encryption Source: Wikipedia
8. Systems using Public Key encryption - SSH - PGP - TLS
9. Digital Signatures Source: Wikipedia
10. What is PGP? From the Wikipedia: Pretty Good Privacy (PGP) is an encryption program that provides cryptographic privacy and authentication for data communication. PGP is used for signing, encrypting, and decrypting texts, e-mails, files, directories, and whole disk partitions and to increase the security of e-mail communications. Phil Zimmermann developed PGP in 1991.[3]
11. Live Coding Session Alert
12. What will we cover? - Generate a set of key pairs using gpg - Import someone else’s public key - Encrypt/decrypt files - Sign messages - Verify signature
13. Stretch goals - Take private key offline - Generate a revocation certificate
14. Sources - https://georgebrock.github.io/talks/pretty-good-introduction/ - https://users.ece.cmu.edu/~adrian/630-f04/PGP-intro.html - https://en.wikipedia.org/wiki/Public-key_cryptography - https://commons.wikimedia.org/wiki/File:Skelleftea_landskyrka_main_view. jpg - Icons taken from Remix Icon under the Apache 2.0 License
15. Tackar!