Randomized judicial routing, adversarial argument as cryptographic precondition, identity-blind decision tier. A federal wiretap nobody can fast-track.
A federal agency files a wiretap request. The protocol routes it to a randomly selected judicial panel — the requesting agent cannot choose, influence, or learn which judge will review it. The judge's identity is not disclosed to the requester during deliberation.
The agency must supply an adversarial argument — a structured legal case cryptographically committed before the judge reads it — that meets the statutory threshold. Without this argument embedded in the envelope at filing, the judge's authorization token cannot release the intercept capability. The argument cannot be retroactively inserted or modified.
No rubber stamp is structurally possible. The randomization, the argument commitment, and the identity-blind decision tier are enforced by the protocol, not by the integrity of individual officials.
Federal wiretap orders, Title III applications, FISA warrants, search warrants, national security letters, pen register orders — any authorization mechanism where adversarial review must be structurally guaranteed.
ABT-W uses Ed25519 digital signatures for authentication of every event at every party. Per-event symmetric keys are derived via HKDF with the event identifier as salt and held in hardware-backed secure storage (Apple iOS Keychain, Android Keystore, or equivalent platform secure-storage). Envelope encryption is performed at the first-party endpoint before any ciphertext leaves the device or origin. Each tier authority’s ciphertext contains only that tier’s authored projection — information not relevant to a tier authority is authored out before encryption, not redacted after. The registry maintains a hash-chained log where each entry’s hash includes the prior entry’s hash, providing tamper-evident integrity across the chain. Forward-only tier activation: registration of a new tier authority causes inclusion of an active tier layer in subsequent envelopes only. Existing envelopes are not retroactively modified. Cryptographic boundary at the first party. Plaintext never moves. Per-tier projection authored at envelope construction. Registry-routed restoration requires structural participation by all three parties.
Cryptography researchers studying envelope encryption, tier-bounded ciphertext, deterministic key derivation, and signed receipt chains in judicial authorization and oversight.
Privacy researchers studying architectural privacy enforcement, unlinkability, purpose limitation, retention through cessation, and consumer-controlled key custody.
Consumer protection advocates seeking architectural alternatives to policy-based privacy enforcement. Cryptographic structural enforcement, not vendor trust.
Policy researchers examining cryptographic enforcement of storage limitation (GDPR Article 5(1)(e)), data minimization (GDPR Article 5(1)(c)), and consumer protection requirements.
Surveillance oversight researchers studying wiretap authorization (Title III), FISA review processes, judicial oversight of executive surveillance, randomized panel routing, identity-blind judicial decision-making, adversarial argument as cryptographic precondition, and accountability mechanisms for classified authorization processes.
