Overview#
A prosecutor needs specific footage clips in a format the court system accepts. Defence counsel requires access to disclosure material under strict time limits. A partner agency needs a redacted version of a surveillance recording without seeing the underlying case file. Each of these scenarios demands controlled, tracked distribution, and none of them should require an investigator to manually burn DVDs or send unencrypted attachments. The Media Export and Sharing module handles secure, auditable distribution of evidence media across all these contexts.
This module is used in law enforcement disclosure workflows, court evidence submission, inter-agency intelligence sharing, and military video intelligence exchanges where access must be controlled without slowing operational tempo.
Key Features#
- Secure evidence sharing through encrypted distribution channels with end-to-end integrity
- Multi-format conversion to meet recipient compatibility requirements across court and agency systems
- Granular access controls with time-limited sharing links and per-recipient permissions
- Distribution tracking with full recipient access logging tied to the audit trail
- Watermarking of shared media to trace any unauthorised further distribution
- Bulk export with format conversion for large-scale legal production
- Redacted version sharing with original evidence preserved separately under access control
- External party sharing with authentication requirements enforced before access is granted
Use Cases#
- Sharing evidence media with defence counsel through encrypted, time-limited, tracked channels that satisfy disclosure obligations
- Converting evidence to court-required formats for submission, or to agency-specific formats for cross-organisation compatibility
- Distributing redacted evidence versions to comply with privacy requirements while preserving unredacted originals for authorised investigators
- Tracking all media distribution for compliance and audit trail purposes across the full disclosure lifecycle
- Packaging military video intelligence for partner nations under access-controlled, watermarked distribution
Integration#
Media Export and Sharing connects with the evidence management, redaction engine, and access control modules. All distribution events are recorded in the audit trail with recipient identity, access timestamp, and file integrity hashes. Exported packages are staged in Cloudflare R2 with cryptographic checksums for tamper-evident handover.
Open Standards#
- ISO 19005 (PDF/A-1 through PDF/A-4): Exported evidence packages are rendered as long-term archival PDFs conforming to ISO 19005-1:2005 through ISO 19005-4:2020, enabling court submission in jurisdictions that mandate tamper-evident archival format.
- RFC 3161 (Internet X.509 PKI Time-Stamp Protocol): Every exported file can receive a trusted-timestamp token from an RFC 3161 timestamp authority, cryptographically binding the SHA-256 digest to a verifiable point in time for chain-of-custody purposes.
- PKCS#7 / CMS (RFC 5652): Digital signatures covering exported documents and their integrity manifests are applied using PKCS#7 Cryptographic Message Syntax, enabling independent signature verification by receiving parties.
- JSON Web Token (JWT, RFC 7519): Time-limited sharing links are issued as RSA-signed JWTs with audience and issuer claims enforced, controlling external-party access without requiring a full account on the platform.
- W3C Verifiable Credentials Data Model v2.0: Evidence items can have Verifiable Credentials issued to them, providing a standardised proof of provenance and custody transfer that travels with the media during inter-agency sharing.
- NIEM 6.0 (National Information Exchange Model): Incident and evidence records can be exported as NIEM 6.0 JSON-LD payloads, ensuring interoperability with law enforcement records-management systems that consume NIEM-formatted data.
- ISO/IEC 27037:2012: The Bates-numbering and chain-of-custody services cite compliance with ISO/IEC 27037 guidelines for identification, collection, and preservation of digital evidence, aligning export packages with internationally recognised forensic handling requirements.
- 28 CFR Part 23: Sensitivity classification of shared criminal-intelligence content follows the US federal 28 CFR Part 23 regulatory framework, enforcing source-reliability and content-validity codes on any package distributed to a law-enforcement recipient.
Last Reviewed: 2026-02-05 Last Updated: 2026-04-14