Gpg

Goal Understand the public-key cryptography revolution and generate your first GPG keypair. This is the foundation for everything else in the course. Prerequisites: Week 2 (Cryptography Fundamentals) This is Part 1 of 4 - Covers history, concepts, and key generation. Introduction: The Public Key Revolution Week 2 taught you symmetric encryption - Alice and Bob share the same secret key. But how do they exchange that key securely? The problem: ...

Goal Master practical GPG operations: understanding your keyring, encrypting files for yourself and others, and creating digital signatures that prove authorship and integrity. Prerequisites: Week 3a (GPG Introduction & Key Generation) This is Part 2 of 4 - Covers keyring management, encryption operations, and signatures. 1. Understanding Your GPG Keyring List All Keys # List public keys gpg --list-keys # Output: pub rsa4096 2025-10-14 [SC] [expires: 2027-10-14] ABCD1234ABCD1234ABCD1234ABCD1234ABCD1234 uid [ultimate] Alice Cypherpunk <[email protected]> sub rsa4096 2025-10-14 [E] [expires: 2027-10-14] Key anatomy: ...

Goal Master public key distribution methods: exporting and importing keys, using keyservers safely, and understanding the Web of Trust model for decentralized identity verification. Prerequisites: Week 3b (Encryption & Signatures) This is Part 3 of 4 - Covers key distribution, keyservers, and web of trust. 1. Public Key Distribution and Import Export Your Public Key # Export in ASCII armor (shareable format) gpg --armor --export [email protected] > alice-public-key.asc # View the exported key cat alice-public-key.asc Output: ...

Goal Complete your GPG mastery with key lifecycle management (rotation, revocation, backup), practical email encryption, and understanding when to use modern alternatives like age for simpler use cases. Prerequisites: Week 3c (Key Distribution & Web of Trust) This is Part 4 of 4 - Covers key management, email encryption, and modern alternatives. 🌱 New to this? If managing keys from the command line feels like a lot, Privacy 101 introduces password managers (KeePassXC, Bitwarden) with a graphical, beginner-friendly approach first: Privacy 101 Week 4: Password Managers → ...

🎯 Goal Learn how to communicate securely using end-to-end encrypted messaging, GPG-encrypted email, and metadata minimization. Explore Signal, Matrix, OTR, and email tools. Understand operational privacy trade-offs. 🌱 New to this? If the command line feels like a lot, Privacy 101 walks through secure messaging with Signal in a graphical, beginner-friendly way first: Privacy 101 Week 6: Secure Messaging → 1. Secure Messaging Protocols Overview Protocol E2EE Decentralized Metadata Safe CLI Available Signal ✅ ❌ (centralized) ❌ (requires phone number) ✅ (via signal-cli) Matrix (Olm) ✅ ✅ ⚠️ (servers can log) ✅ (nheko, gomuks, etc) XMPP + OTR ✅ ✅ ✅ (self-hosted possible) ✅ (profanity, mcabber) Tox ✅ ✅ (P2P) ✅ ✅ (toxic) 2. Signal CLI Setup Install signal-cli For Debian-based distros: ...

Goal Learn bash scripting fundamentals tailored for security workflows and master automating GPG encryption operations in scripts. Prerequisites: Weeks 1-9 (encryption, GPG, system administration) This is Part 1 of 2 - Covers scripting fundamentals and GPG automation. 1. Why Automate Security Workflows? The Problem: Manual Tasks Get Skipped Security fatigue is real: Manual backups → forgotten until disaster strikes Key rotation → procrastinated indefinitely Log reviews → “I’ll do it tomorrow” (never happens) Security updates → Delayed due to inconvenience Result: Security degrades over time ...