FAQ - How do you detect tampering and alterations?
Free evaluation...what's the catch?
How do you detect
tampering and alterations?
Electrical interference exists everywhere. It originates from external sources (electrical outlets, cell phones, radio & TV signals, etc...) and from within the recording device (dirty or scratched recording heads, unshielded circuitry, low grade recording medium, etc...). Most of these sources leave a cyclical or rhythmic pattern buried within the final recording.
By detecting disruptions in these seemingly invisible patterns, we can document edits within the recording. By locating duplicate non-overlapping patterns, we can detect dubbing. And by analyzing sub-pixel data, we can detect alterations (e.g. objects added or removed from a picture or video).
Similar methods are used to pattern gunshots or how we authenticated the Amelia Earhart photo. The results are
then documented in a textual and graphical report. If you want to learn
more about HOW TO DO THIS, then you may wish to read
Forensics, and Analyst.