Digital Forensics & Evidence
Digital Forensics & Evidence
Legally Admissible Evidence from Digital Sources
Digital evidence — emails, device data, network logs, cryptocurrency transactions, deleted files, and cloud records — determines outcomes in cybercrime prosecutions, commercial disputes, and employment investigations. SIRI Law LLP coordinates forensic investigations and advises on digital evidence admissibility, chain of custody, and the certification requirements of Indian evidence law.
Overview
Digital Evidence in Indian Law: What Courts Require
The Bharatiya Sakshya Adhiniyam, 2023 (BSA) — which replaced the Indian Evidence Act — establishes the framework for electronic evidence admissibility. Section 63 BSA requires a certificate from a responsible official confirming the integrity and accuracy of electronic records. Without this certificate, electronic evidence is inadmissible — regardless of its factual accuracy.
Chain of custody is equally critical. Digital evidence must be handled using forensically sound methods — using write-blockers, hashing, and documented acquisition procedures — or its integrity can be challenged. Evidence collected carelessly by a non-specialist is vulnerable to admissibility challenges even when its content is genuine.
SIRI Law LLP coordinates forensic investigations using specialist forensic partners and advises on the legal requirements for evidence collection, storage, and presentation that ensure digital evidence is admissible when it matters.
Types of Digital Evidence We Work With
→ Email and messaging platform data
→ Device forensics — computers, phones, tablets
→ Network logs and server access records
→ Cloud storage and SaaS platform records
→ Cryptocurrency blockchain transaction analysis
→ Deleted file recovery and metadata analysis
→ CCTV and video evidence authentication
→ Social media evidence preservation
→ Website and application access logs
Services Offered
Digital Forensics & Evidence Services
- Digital evidence admissibility advisory — Section 63 BSA 2023
- Section 65B certificate procurement and advisory (legacy evidence)
- Chain of custody protocol design and oversight
- Forensic investigation coordination — specialist forensic partners
- Device forensics — computers, smartphones, storage media
- Email and communication forensics
- Cloud forensics — AWS, Azure, GCP, SaaS platforms
- Network forensics — log analysis, intrusion timeline reconstruction
- Cryptocurrency and blockchain transaction tracing
- Deleted file and metadata recovery
- Forensic imaging and write-blocker acquisition protocols
- Anti-forensics detection — identifying evidence tampering
- Expert witness coordination — technical expert evidence
- Digital evidence presentation for court and tribunal proceedings
- Preservation orders — emergency court applications
- Employee investigation — device and communication forensics
Why SIRI Law LLP
Our Approach & Advantage
Court-Ready Evidence
Our forensic process is designed from the outset for court admissibility — chain of custody, Section 63 BSA certification, hash verification, and documented acquisition protocols that withstand challenge.
Legal-Forensic Integration
Unlike standalone forensic firms, we integrate legal strategy with forensic findings — ensuring evidence is collected in the way that best serves the legal proceedings, not just technically sound in isolation.
Privilege Protection
Where forensic investigation is conducted under legal privilege, findings are protected from regulatory compulsion — a critical distinction for breach investigations and internal investigations.
Multi-Platform Expertise
From device forensics to cloud platforms to blockchain analysis — our forensic partners cover the full range of digital evidence sources that matter in modern disputes.
Representative Matters
Typical Engagements
All matters described generically to protect client confidentiality.
Employee Theft — Device Forensics
Coordinated forensic investigation of a former employee’s work device — recovering deleted files demonstrating theft of client database before resignation. Section 63 BSA certificate obtained and evidence used successfully in criminal proceedings.
Commercial Dispute — Email Authentication
Authenticated a disputed email chain in a commercial dispute — forensic analysis of email headers and server logs established that emails had been forged by the opposing party. Evidence led to settlement on favourable terms.
Cryptocurrency Fraud — Blockchain Tracing
Traced ₹2.1 crore in cryptocurrency fraud proceeds across 7 wallets and 4 exchanges through blockchain analysis — providing the evidence base for a court order requiring exchange to freeze and return funds.
POSH Investigation — Device Forensics
Conducted forensic analysis of a work device in a contested POSH investigation — recovering electronic communications that corroborated the complainant’s account on a material allegation denied by the respondent.
Frequently Asked Questions
What is the Section 63 BSA 2023 certificate requirement?
The Bharatiya Sakshya Adhiniyam, 2023 requires electronic evidence to be accompanied by a certificate from a responsible official of the device or system from which the evidence was obtained, certifying accuracy and integrity. Without this certificate, electronic records cannot be used in evidence. The certificate must identify the device, state that it was operating properly, and confirm the evidence was produced by the system in the ordinary course of its operation. We advise on obtaining compliant certificates and on challenging non-compliant certificates tendered by opposing parties.
What is forensic imaging and why does it matter?
Forensic imaging creates a bit-for-bit copy of a storage device — including deleted files, file system structures, and slack space — using write-blocking hardware that prevents any data from being written to the original during the process. The image is verified by MD5/SHA hash to prove it is an identical copy. Forensic imaging preserves all evidence while allowing analysis without risk of contaminating the original. Evidence extracted from an unimaged original device can be challenged for contamination.
Can deleted files be recovered?
In many cases, yes. When a file is ‘deleted’, the operating system typically marks the space as available but does not immediately overwrite the data. Forensic tools can recover intact deleted files and fragments of deleted files from this unallocated space. The probability of recovery depends on how long ago the file was deleted, how much the device has been used since deletion, and whether the storage has been encrypted or wiped. We advise on the feasibility of recovery based on the specific facts.
How is cryptocurrency evidence obtained and authenticated?
Cryptocurrency transactions are recorded permanently on the public blockchain — every transaction is visible, timestamped, and cryptographically verifiable. Blockchain analysis tools can trace cryptocurrency flows across wallets, identify exchanges and off-ramps where cryptocurrency was converted to fiat currency, and link wallet addresses to identified individuals through transaction pattern analysis and exchange KYC records (obtained via legal process). Blockchain evidence is authenticated by demonstrating the queried blockchain data is publicly verifiable.
Need Forensic Evidence for Legal Proceedings?
We coordinate forensically sound, legally admissible digital evidence collection.
Also see: Cybercrime Advisory · Breach Response