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🔒 Cryptographic Safety & Zero-Knowledge Architecture
HMAC-SHA-256
Selections are blinded locally into one-way cryptographic tokens. Declined or skipped boundaries emit zero tokens, making them mathematically impossible for anyone to inspect.
Private Set Intersection
The server blindly calculates mutual set overlap (Tokens_A ∩ Tokens_B) without ever seeing item names, individual choices, or catalog keys.
AES-GCM-256
Private notes, voicenotes, and chat messages are encrypted client-side. Key material is isolated strictly in the URL hash fragment (#key=...) and is never sent to the server.
Zero-Persistence Memory
No database and no disk logging. Enclaves exist exclusively in ephemeral RAM with automated TTL expiration and instant cryptographic burn switches.