SHA-512 is a NIST-standardised cryptographic hash function that produces an irreversible fingerprint of any file. Here’s how it makes packing photos and videos tamper-proof.
Every common image and video format can be edited without leaving a visible trace. That’s a fundamental problem when the file needs to serve as evidence.
Image editors can crop, retouch, or composite photos without any indicator in the file itself. A dispute reviewer has no way to tell whether a photo has been altered.
Timestamps, GPS tags, and device information stored in MP4 and MOV containers can be changed with freely available tools. Metadata alone is not proof of anything.
An upload timestamp shows when a file was saved to a server, not when the recording was originally made. Uploading a pre-existing photo proves nothing about capture timing.
Insurance adjusters and marketplace reviewers know that uncertified files are unreliable. Without independent verification, photographic evidence is treated as circumstantial at best.
SHA-512 processes the binary content of a file through 80 rounds of mathematical operations to produce a 128-character hexadecimal string. This process has specific properties that make it ideal for evidence verification.
The same file always produces the same hash. Run the algorithm a million times on an unmodified recording, and the result is identical every time—providing a stable reference for verification.
Changing even a single bit of the input produces a completely different hash. There’s no way to make a "small" edit that preserves the original fingerprint.
Given a hash, it is computationally infeasible to reconstruct the original file or find a different file that produces the same hash. The function is effectively one-way.
The probability of two different files producing the same 512-bit hash is astronomically low—roughly 1 in 2²⁵⁶. No SHA-512 collision has ever been found.
Cryptographic hashing transforms a photo or video from a questionable file into independently verifiable proof with a clear chain of integrity.
Anyone can recalculate the SHA-512 hash and compare it to the certificate. If the hashes match, the file is unmodified—no need to trust the certifying party.
SHA-512 is part of the SHA-2 family published by the National Institute of Standards and Technology. It’s used by governments, banks, and legal systems worldwide.
With a 512-bit output, SHA-512 provides a security margin far beyond current computational capabilities. Records sealed today will remain verifiable for decades.
The hash proves file integrity without revealing the file contents. A third party can verify the certificate without needing access to the underlying recording.
Capture the items, their condition, and the packaging process with a photo or video on any device. The raw file becomes the input to the hash function.
The moment recording stops, PackProof feeds the complete file through the SHA-512 algorithm, producing the 128-character hash that uniquely identifies this specific recording.
The hash is bundled with the verified capture time, GPS coordinates, and packer identity into a sealed certificate. All elements are locked together.
When evidence is needed, retrieve the certificate and optionally re-hash the original file to confirm the fingerprints match. Verification takes seconds.
Cryptographic verification applied automatically to every photo and video. Free 14-day trial — no credit card required.