5-Layer AI Document Forensics & X.509 Cryptographic Sealing
Registrar offices, state licensing boards, and immigration attorneys trust DIGIT because every credential undergoes mathematical pixel forensics, typography chronology inspection, and UNESCO WHED institutional verification before being sealed with an X.509 digital certificate.
How Our AI + Human Forensic Pipeline Protects Institutional Integrity
Unlike traditional evaluators that rely solely on visual inspection of paper photocopies, DIGIT inspects every uploaded PDF and high-resolution scan across five independent forensic layers:
01. pyHanko PKCS#7 / X.509 Cryptographic Priority
When a university issues a digitally signed e-transcript (e.g., Parchment, NSC, Digitary, CHSI, My eQuals, or Government of India DigiLocker), DIGIT validates the embedded cryptographic signature chain first. Mathematically intact signatures override minor scan compression artifacts.
02. DualBranchForensicNet (RGB + SRM Filter Bank)
Our PyTorch ResNet50 + Spatial Rich Model (SRM) high-pass residual network isolates copy-move grade splicing, cloned registrar stamps, and localized JPEG re-compression anomalies across all pages of multi-page transcripts, generating Grad-CAM bounding boxes for human auditors.
03. Typography Chronology & Kerning Jitter Forensics
Detects anachronistic fonts (such as Calibri appearing on a diploma dated prior to 2007) and horizontal baseline shifts caused by PDF text-box overlays.
04. UNESCO WHED & Charter Chronology Cross-Check
Verifies that the awarding institution held national accreditation during the exact years the student attended, blocking unaccredited diploma mills and third-party identity mismatches.
05. Tamper-Evident Output PDF + Instant QR Verification
Approved evaluations are sealed with DIGIT's X.509 certificate and include a unique verification QR code that links registrars directly to the live, immutable audit record.
