The Signed Letter

Somewhere there’s a phone I no longer own, and on it is the first message I ever sent my wife. I have no idea what it said. It’s gone.

People kept letters because letters carried weight. A postmark, a signature, a wax seal. You knew who said something because the object proved it.

The internet made communication free and we stopped keeping any of it. A million texts, none worth saving. That first WhatsApp message is on an old phone I traded in years ago. Gone.

Authenticity went with it. Text became cheap to copy, easy to fake, impossible to trace. For a long time that was fine, because making convincing fake content was still hard. Faking a photo took skill. Faking a voice took a studio. Effort was the filter.

Generative AI removed the filter.

Now anyone can produce a photorealistic image, a cloned voice, a fluent article, a synthetic video. In minutes. Free. Indistinguishable.

Effort was the last thing protecting authenticity. That protection is gone.

Content provenance is the attempt to put the signature back.

Two things worth knowing:

C2PA (Coalition for Content Provenance and Authenticity) embeds cryptographic metadata directly into a file. Who made it, when, with which tool, whether it was edited. A chain of custody, invisible but verifiable. Nikon, Canon, Adobe, and Microsoft are already building it in.

SynthID, from Google DeepMind, watermarks AI-generated content at a level you can’t see but a scanner can. Images, audio, text. The mark travels with the file.

Think of it as a supply chain label for information. You can ask of any piece of content: was this photographed or generated? Was this voice recorded or synthesized? The answer is in the file.

The technology works. That’s not the problem.

The problem is adoption. Provenance only holds if the whole chain participates. Every camera, every model, every platform, every network. One gap breaks it. A signed image uploaded to a platform that strips metadata is just unsigned again. The hard part is getting an entire ecosystem to agree, implement, and hold the line everywhere, all the time.

We’re not there. But the work is real.

When something costs nothing to send, we stop caring where it came from.

We’re starting to pay for that.

A signed letter is better than an anonymous note. Even if the seal isn’t wax anymore.

#AI #ContentProvenance #C2PA #SynthID #AITrust #InformationIntegrity #DeepMind #AISafety #TechPolicy #ProductManagement