Forensic Methodology and Standards

Forensic Methodology and Legal Standards

EvidenceChain is built with explicit alignment to international digital forensics standards under the technical oversight of a certified judicial computer expert (Perito Informático Colegiado Nº 03624).

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1. Relevant Forensic Standards

• ISO/IEC 27037: Guidelines for identification, collection, acquisition, and preservation of digital evidence.
• RFC 3161: Internet X.509 Public Key Infrastructure Time-Stamp Protocol (TSP).
• UNE 71506: Spanish standard for digital forensic methodology and chain of custody preservation.

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2. Chain of Custody Guarantees

In digital litigation, digital evidence must satisfy three criteria to be admissible:

1. Authenticity: Evidence must originate from the declared source.
2. Integrity: Evidence must remain unmolested from the instant of generation to the moment of examination.
3. Continuity: Every handoff and aggregation step must be verifiable.

EvidenceChain satisfies all three via SHA-256 parent chaining and Merkle trees, rendering database tampering mathematically impossible without detection.