Image: Sony Sony claims its newly-announced PXW-Z300 camcorder is the "world's first" to be able to record industry-standard ...

Using Cryptography to Prove Authenticity If you take a digital file — a photograph, video, book, or other piece of data — and digitally process or “sign” it with a secret cryptographic “key,” the ...

If the opponent meets the requirement of (1), the item of evidence will be admissible only if the proponent demonstrates to the court that it is more likely than not authentic. (3) Applicability.