Overview#
When an evidence repository handles thousands of items daily across multiple facilities, accountability depends entirely on the fidelity of the action log. A missed transfer record or an unsigned access event can collapse a prosecution or trigger a regulatory finding. The Compliance Custody Action Logging module addresses this directly by creating immutable, cryptographically verified records of every custody action, transfer, and access event, with zero tolerance for gaps.
Designed for law enforcement agencies, legal teams, and compliance organisations, the system scales to hundreds of thousands of daily custody actions while maintaining the forensic standards required for court admissibility and regulatory audit.
Key Features#
- Complete custody accountability with cryptographic proof of authenticity for every evidence action
- Court-ready documentation with digital signatures and witness verification for legal proceedings
- Evidence loss prevention through continuous custody tracking and monitoring across all facilities
- Advanced hash chaining creating verifiable custody sequences: each event cryptographically links to its predecessor, making retroactive modification mathematically detectable
- Multi-signature authorisation ensuring high-value evidence transfers require independent verification from multiple custodians
- High-volume processing supporting hundreds of thousands of daily custody actions without performance degradation
- Automated alerting for unauthorised access attempts and custody anomalies
- Export capabilities formatted for regulatory inspection and legal discovery
Use Cases#
- Evidence Accountability: Law enforcement agencies log every evidence handling action with cryptographic proof, ensuring complete accountability from intake through disposal
- Legal Defence Preparation: Legal teams produce court-ready custody documentation that withstands scrutiny during criminal and civil proceedings
- Regulatory Compliance: Organisations demonstrate evidence handling compliance through immutable audit trails and continuous monitoring, satisfying both domestic and international regulatory expectations
- Multi-Custodian Operations: Evidence repositories managing physical and digital assets track custody transfers with independent verification from multiple custodians, supporting INTERPOL-level multi-agency operations
Integration#
- Connects with evidence management systems and digital asset repositories
- Compatible with case management platforms for synchronised custody tracking
- Supports court filing and legal proceedings documentation workflows
- Role-based access controls with multi-level authorisation and audit logging
- Automated alerting for unauthorised access attempts and custody anomalies
- Export capabilities for regulatory inspection and legal discovery
Open Standards#
- RFC 8032 (Ed25519): Every custody action entry is digitally signed using Ed25519, with the public key fingerprint and key ID embedded in each record's metadata to enable independent signature verification.
- FIPS 180-4 / FIPS 202 (SHA-256, SHA-512, SHA-3-256): Evidence integrity records store cryptographic hashes computed with SHA-256, SHA-512, SHA3-256, and BLAKE2b; hash chaining between sequential custody events uses SHA-256 to make retroactive tampering mathematically detectable.
- FBI CJIS Security Policy (v5 §5.4): The compliance mapping explicitly implements CJIS controls 5.4.1 Auditing and Accountability, 5.4.2 Audit Record Content, 5.6.2.2 Advanced Authentication, and encryption-in-transit and at-rest controls required for criminal justice information handling.
- NIST SP 800-53 (Rev. 5): Audit event logging and chain validation are mapped to controls AU-2 Event Logging, AC-2 Account Management, SC-8 Transmission Confidentiality, and SC-13 Cryptographic Protection, supporting FedRAMP-aligned deployments.
- ISO/IEC 27001:2022: The custody and audit trail subsystem is assessed against Annex A controls including A8.15 Logging, A8.16 Monitoring, and A8.24 Cryptography, with automated compliance scoring reported per organisation.
- ArcSight Common Event Format (CEF): Audit events are exported as CEF-formatted log lines for ingestion into SIEM platforms, enabling correlation and alerting in tools such as Splunk, Microsoft Sentinel, Elastic SIEM, and IBM QRadar.
- ETSI TS 104 008 (CABCA): Continuous Auditing-Based Conformity Assessment cycles use a Merkle-tree over collected evidence hashes to produce a tamper-evident conformity record, with quality criteria aligned to ETSI TR 103 910.
Last Reviewed: 2026-02-23 Last Updated: 2026-04-14