The document discusses identity on the blockchain and self-sovereign identity. It introduces Christopher Allen and his background working on privacy and cryptography. It notes that Blockstream has no identity product but believes in openness and accountability. While identity on the blockchain could hold the powerful accountable, it could also be used to target the powerless. The document advocates for 10 principles of self-sovereign identity including individual control over one's own identity and data. It promotes further discussion on supporting self-sovereign identity at upcoming United Nations and Rebooting Web of Trust events.