Authentication: who are you? Proofs are passwords, codes and keys
2025-12-14
In many systems, various actions can only be performed as some kind of Identity. We must authenticate ourselves by proving who we are. Authentication fundamentally is just an answer to this question: who are you and can you prove it is true?
Centralized vs Decentralized Identity tradeoffs: Twitter/X, YouTube, Mastodon, ActivityPub and NOSTR
2025-07-12
Social media and various other online platforms require some sort of identity to provide their services and to customize experience to us. What does it mean exactly and how does it work in practice? Currently most, if not all, of these platforms - Twitter/X, YouTube, Reddit, LinkedIn, Facebook, Instagram, GitHub, Amazon, Spotify and the like - are account-based.