What the ledger found once it was actually run.
Structural Rock Core & Outcrop Mineral Sampling
- Course
- GLY 304: Field Geology & Structural Petrology Mapping
- Site
- Faculty of Physical Sciences Geological Traverse Rigs
The problem
Students in field geology courses frequently submitted recycled rock outcrop photos from senior colleagues' past field logs or downloaded generic mineral strata photographs from web databases instead of executing designated field mapping traverses.
What the audit did
Provenance extracted embedded GPS coordinate geotags, camera shutter timestamps, and sensor optical profiles, verifying that the specimen photographs were captured in-situ during the assigned practical session at the designated geological stratum.
186 Rock Cores
Specimens Audited
34 Submissions
Recycled Strata Flagged
< 32ms / File
Verification Latency
Specimen comparison
- Capture time
- 18 Nov 2025, 11:24 WAT
- Resolved place
- Geological Field Traverse · Sector 4 Stratum
- Hardware
- Nikon D3500 · 18-55mm f/3.5-5.6 (Sensor RAW Intact)
- Coordinates
- 6.24831° N, 7.11472° E (In-Field Geofence Pass)
- Capture time
- Stripped / Edited EXIF (Capture Date Null)
- Resolved place
- Missing GPS Telemetry
- Hardware
- Adobe Photoshop Lightroom Transcode
- Coordinates
- Coordinates Absent (Fail)
Laser Interferometry & Oscilloscope Screen Capture Auditing
- Course
- PHY 306: Advanced Optics, Laser Physics & Modern Instrumentation
- Site
- Physical Sciences Physics Darkroom & Laser Lab III
The problem
Laboratory demonstrators observed identical He-Ne laser diffraction rings and cathode-ray oscilloscope waveform captures submitted across multiple student lab groups from different class cohorts.
What the audit did
Local SHA-256 cryptographic hashing flagged exact binary duplicate submissions instantaneously, while optical metadata analysis detected secondary screen-capture re-photographing vs genuine direct optical sensor telemetry.
62 Cohorts
Lab Groups Screened
14 Duplicates
Waveform Collisions Detected
Reduced by 92%
Demonstrator Audit Time
Specimen comparison
- Capture time
- 12 Jan 2026, 15:42 WAT
- Resolved place
- Physics Optics Darkroom Lab Bench 2
- Hardware
- Canon EOS 2000D · EF-S 18-55mm (Aperture f/4.0)
- Coordinates
- Indoor Sensor Clock Timestamp Valid
- Capture time
- Timestamp Mismatch (2024 Archive)
- Resolved place
- Unknown
- Hardware
- WhatsApp Compression Header (EXIF Null)
- Coordinates
- Identical SHA-256 to Group 03
Spectrophotometric Assays & TLC Chromatogram Provenance
- Course
- ICH 312: Instrumental Analytical Chemistry & Spectrophotometry
- Site
- Physical Sciences Industrial Chemistry Instrumentation Lab
The problem
Students often photographed spectrophotometer digital readout displays or Thin Layer Chromatography (TLC) plates days before or after scheduled laboratory hours, or shared identical titration endpoint images across lab benches.
What the audit did
Real-time sensor clock validation verified that UV-Vis assay and chromatogram captures occurred strictly within the allocated 3-hour practical lab window, while cryptographic hashing eliminated cross-student photo sharing.
240 Records
Assay Photos Audited
28 Files
Timestamp Violations Flagged
100%
Accuracy of Forensic Detection
Specimen comparison
- Capture time
- 09 Feb 2026, 10:14 WAT
- Resolved place
- Analytical Chemistry Spectrophotometry Unit
- Hardware
- Sony Alpha 6400 · 16-50mm (Native EXIF)
- Coordinates
- Scheduled Lab Window Verified (Pass)
- Capture time
- Timestamp Exceeds Scheduled Lab Period (+48 Hours)
- Resolved place
- Unknown
- Hardware
- Generic RGB / Metadata Stripped
- Coordinates
- Hardware Signature Inconsistent (Fail)
Materials Testing & Petrochemical Facility Telemetry Auditing
- Course
- FPS 300: Physical Sciences Industrial Attachment (6 Months)
- Site
- Industrial Geotechnical & Materials Characterization Laboratories
The problem
Supervisors lacked reliable verification mechanisms to confirm whether students physically reported to assigned industrial testing laboratories (materials testing, geochemical laboratories, quality control units) or fabricated technical logbook evidence.
What the audit did
Geospatial EXIF coordinates extracted in-browser validated student physical presence at verified industrial host laboratories across Nigeria against official placement records.
310 Trainees
SIWES Logbooks Audited
98.7%
Geotag Verification Rate
< 24 Hours
Departmental Sign-Off SLA
Specimen comparison
- Capture time
- 14 Oct 2025, 14:30 WAT
- Resolved place
- Industrial Materials Characterization Facility
- Hardware
- Samsung Galaxy S23 · Sensor EXIF Intact
- Coordinates
- 4.7821° N, 7.1042° E (Verified Placement Pass)
- Capture time
- Capture Date Precedes Internship Enrollment
- Resolved place
- Mismatched Coordinate (>300km Distance)
- Hardware
- Stripped Mobile Screenshot
- Coordinates
- GPS Coordinates Deviate from Placement (Fail)
Every one of these started with a single photograph.
Faculty of Physical Sciences, Nnamdi Azikiwe University, Awka.