Preserve Digital Evidence That Holds Up Under Scrutiny

The problem: evidence challenged as tampered

A digital file is only as useful as your ability to prove it has not changed. Investigators, auditors and legal teams routinely face the same challenge in front of a court or a regulator: how do you show that the photo, ledger, email or log you are relying on is exactly what it was when you collected it? Without a defensible record, the opposing side can simply assert that the file may have been altered — and the doubt does the damage, even when nothing was touched. e-Dex, the Digital Evidence Integrity Suite from Innovativa SoftTech in Pune, India, exists to remove that doubt with cryptographic proof rather than assurances.

How e-Dex proves integrity

When you record a file, e-Dex computes a cryptographic hash — a fixed-length fingerprint of its contents. Change a single byte and the hash changes completely, so a matching value is strong evidence that nothing was altered. On verification, e-Dex recomputes the hash and prints a plain MATCH or MISMATCH verdict. For extra assurance you can seal a certificate with a PAdES digital signature using a Digital Signature Certificate (DSC), and stamp it with an RFC-3161 trusted timestamp from an independent Time-Stamping Authority — so both the document's integrity and the time it was produced become independently verifiable. Every step is recorded in a tamper-evident audit log and chain of custody.

Built for investigators, lawyers and auditors

e-Dex is built around the everyday moments where integrity must be shown. Investigators and police use it to demonstrate a seized file has not drifted since collection. Lawyers rely on it to back the integrity of a document before it is tendered. Auditors and compliance teams attach it when handing extracted data back to a client or a regulator, and cyber consultants issue it alongside reports so a client can re-verify months later. The audit log and chain of custody mean the record of who handled a file, and when, travels with the evidence rather than living in someone's memory.

24+ signed certificate types, including BSA s.63 / 65B

Beyond the everyday integrity certificate, e-Dex ships more than 24 certificate templates covering a range of evidence and assurance scenarios. Among them is the electronic evidence certificate for India — the Section 63 BSA 2023 form (formerly Section 65B of the Indian Evidence Act), which wraps the integrity values in the court-prescribed Part A / Part B Schedule along with device, acquisition and deponent details. Each certificate can be PAdES-signed and RFC-3161 timestamped. e-Dex helps you produce a well-structured, integrity-backed document; it is a tool, not a substitute for legal counsel, and it does not guarantee that any document will be admitted.

Free, and fully offline — nothing leaves your machine

e-Dex is free to download and runs entirely on your own Windows 10 or Windows 11 machine. Hashing files, recording the audit log and chain of custody, and generating certificates all happen locally — your evidence files never leave your computer, which matters when the material is sensitive or confidential. The only step that touches the internet is the optional RFC-3161 timestamp, which contacts a Time-Stamping Authority. You can read more about a single evidence integrity certificate or download the suite and start proving your files are exactly what they should be.

Frequently Asked Questions

Is e-Dex really free and fully offline?
Yes. e-Dex is free to download and runs entirely on your own Windows machine. Hashing files, recording the audit log and chain of custody, and generating certificates all happen locally, so your evidence files never leave your computer. An internet connection is only needed if you choose to apply an RFC-3161 trusted timestamp from a Time-Stamping Authority.

Which hash algorithms does e-Dex compute?
e-Dex computes multiple algorithms per file, including SHA-256, SHA-512 and BLAKE3, alongside MD5 and SHA-1 for compatibility with older records. Listing several algorithms side by side strengthens the integrity proof and lets a verifier match against whichever value was originally recorded.

Does e-Dex produce a Section 63 BSA / Section 65B certificate?
e-Dex includes a template for the Section 63 BSA 2023 (formerly Section 65B Indian Evidence Act) electronic evidence certificate among its 24+ certificate types. It helps you produce a well-structured, integrity-backed document; it is a tool, not legal advice, and does not guarantee that any document will be admitted. How evidence is tendered and weighed depends on the facts of your matter and the current text of the law.

How does e-Dex prove a file has not been tampered with?
e-Dex computes a cryptographic hash of each file when you record it, then recomputes and compares that hash on verification to print a plain MATCH or MISMATCH verdict. Certificates can be sealed with a PAdES digital signature using a Digital Signature Certificate (DSC) and stamped with an RFC-3161 trusted timestamp, so the document's integrity and the time it was produced are both independently verifiable.