NeuroCrypt
NC-INC-0007 Incident - open Rev 31
Operations Review
Incident Register - Document Class: Report

Incident 0007

FieldEntry
SubjectSubject 0447 - concurrent attestation at two depths
Registered2017
ProgramNC-PR-0003 Program Witness
Subject designationR-0447 - see roster
Dispositionopen

1Event

Subject 0447, then at cycle 1,106, attested at Ring-floor terminal 31 (depth 1,340 m) at 03:19:47.31.

A second attestation carrying subject 0447's identity commitment was appended at terminal 12 (depth 610 m) at 03:19:51.49, 4.2 seconds later and 730 vertical meters away, by a route whose fastest transit is 11 minutes.

Both attestations verify. Both carry witnessed state hashes consistent with Ring conditions at their respective depths and moments. Neither is a replay of the other; the witnessed state differs exactly as much as the two locations should differ.

2Immediate response

Terminal 12 was isolated within four minutes and physically inspected within the hour. It was unoccupied. Access logs for the 610 m level record no entries for the preceding 46 minutes. The corridor cameras covering the approach were operating and recorded no one.

Subject 0447 was located at terminal 31, where they had remained. The subject was aware of no irregularity and reported an ordinary cycle. The subject has been consistent on this point across nine annual reviews and has never varied the account.

3Analysis

The substrate does not permit two attestations to be recorded as simultaneous; these were 4.2 seconds apart, which the substrate handled correctly and without flagging. Program Lattice's position is that the substrate performed to specification, which is not disputed and is also not the question.

Four explanations were considered. Terminal spoofing was excluded (terminals authenticate in hardware; terminal 12's attestation is signed by terminal 12). Commitment theft was excluded (an identity commitment cannot be replayed to produce a novel, location-consistent witnessed state). Clock fault was excluded on three independent references. The fourth explanation is recorded in Annex A and is not served in this extract.

Subject 0447 was withdrawn from cycles at their own request, eleven days after the event. The request gave no reason. Withdrawal does not revoke the two attestations, which remain in the chain, both valid, permanently.

Finding carried at each annual review The register cannot record that subject 0447 was in two places. It records that subject 0447 was witnessed in two places. NeuroCrypt is not currently able to state, on the evidence it holds, that these are different claims.
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