Variants
Commerce
Encrypted consumer PII in AI agent transactions. Plaintext never leaves the consumer's device. Retention structurally enforced through the envelope.
Medical
Patient health data encrypted at the consumer device. Clinical records, diagnoses, and treatment history protected by structural retention expiry.
Identity
Cryptographic identity verification where biometric and credential data never moves in plaintext. Per-tier projection enforced mathematically.
Warrants
Legal warrant data cryptographically sealed and routed to authorised judicial tiers only. Structural access controls — not policy-based.
Voting
Ballot data encrypted at the voter's device. Cryptographic unlinkability between voter identity and vote choice. Auditable without exposing intent.
Records
Government and archival records with cryptographically enforced access tiers. Structural immutability — records cannot be altered, only superseded.
Spending
Financial spending data encrypted before transmission. Budget and transaction records revealed only to cryptographically authorised tier recipients.
Education
Academic records and credentials encrypted at the student device. Transcripts and certifications accessible only to cryptographically authorised institutions.
Evidence
Legal evidence with cryptographic chain of custody. Each access event is recorded in the hash-chained registry witness — structurally immutable.
Device
IoT and connected device telemetry encrypted at the source hardware. Sensor data and device state never transmitted in plaintext to any downstream tier.