HCS-XX: Encrypted Persistent AI Context (Anamnesis Protocol)

[gamilu]

Proposal: Encrypted Persistent AI Context

Author: Luther Lee Pollok III (@gamilu)

Summary

A standard for user-owned, encrypted AI context on Hedera. An individual's AI conversation history, preferences, and accumulated knowledge are encrypted with a key derived from an HTS token they own and a wallet signature they produce. The encrypted context is stored via HCS-1. No server ever holds plaintext. The key is never stored — it is derived fresh each session.

Problem

Every major AI platform today maintains custody of user context. Users cannot own their AI memory, cannot port it across providers, and are subject to platform compellability (government subpoenas, terms changes, shutdowns).

Solution

• Ownership layer: HTS NFT — token transfer = vault transfer
• Key derivation: HKDF-SHA256(token_id || wallet_signature, info="anamnesis-v1")
• Encryption: AES-256-GCM with token_id as AAD
• Storage: HCS-1 (recommended over HFS for per-session update cost)
• Audit trail: HCS topic

Relationship to Existing Standards

Builds on HCS-1 (storage), HTS (ownership), and complements HCS-11 (AI agent profiles) and HCS-14 (AI agent communication).

Reference Implementation

Full specification and Apache 2.0 reference implementation:
https://github.com/anamnesis-protocol/anamnesis

Draft PR

Companion PR forthcoming with full spec in docs/standards/.