When AI Can Fake Reality, Who Can You Trust? - Sam Gregory (Transcript)

Here is the full transcript of Sam Gregory’s talk titled “When AI Can Fake Reality, Who Can You Trust?” at TED conference.

In this TED talk, technologist and human rights advocate Sam Gregory discusses the increasing difficulty in distinguishing between real and AI-generated content, highlighting the advancements in generative AI and deepfakes. He underscores the growing threat these technologies pose, particularly in spreading falsified sexual images and undermining trust in information.

Gregory, who leads the human-rights group WITNESS, details their efforts to combat deepfakes through the “Prepare, Don’t Panic” initiative and a rapid-response task force of media-forensics experts. He shares insights from cases they’ve encountered, emphasizing the challenges experts face in definitively identifying deepfakes. Gregory stresses the need for comprehensive solutions, including better deepfake detection tools, media literacy, and content provenance through techniques like watermarking and cryptographically signed metadata.

He advocates for a responsible AI pipeline involving government oversight, transparency, and accountability. Gregory concludes by emphasizing the importance of taking proactive steps to prevent a future where distinguishing between real and fake becomes increasingly challenging.

Listen to the audio version here:

TRANSCRIPT:

The Challenge of Distinguishing Real from Fake in the AI Era

It’s getting harder, isn’t it, to spot real from fake, AI-generated from human-generated. With generative AI, along with other advances in deep fakery, it doesn’t take many seconds of your voice, many images of your face, to fake you, and the realism keeps increasing.

I first started working on deepfakes in 2017, when the threat to our trust in information was overhyped, and the big harm, in reality, was falsified sexual images. Now that problem keeps growing, harming women and girls worldwide.

But also, with advances in generative AI, we’re now also approaching a world where it’s broadly easier to make fake reality, but also to dismiss reality as possibly faked. Now, deceptive and malicious audiovisual AI is not the root of our societal problems, but it’s likely to contribute to them. Audio clones are proliferating in a range of electoral contexts. “Is it, isn’t it” claims cloud human-rights evidence from war zones, sexual deepfakes target women in public and in private, and synthetic avatars impersonate news anchors.

The Role of WITNESS in Combatting Deepfakes

I lead WITNESS. We’re a human-rights group that helps people use video and technology to protect and defend their rights. And for the last five years, we’ve coordinated a global effort, “Prepare, Don’t Panic,” around these new ways to manipulate and synthesize reality, and on how to fortify the truth of critical frontline journalists and human-rights defenders.

Now, one element in that is a deepfakes rapid-response task force, made up of media-forensics experts and companies who donate their time and skills to debunk deepfakes and claims of deepfakes. The task force recently received three audio clips, from Sudan, West Africa, and India. People were claiming that the clips were deepfaked, not real.

In the Sudan case, experts used a machine-learning algorithm trained on over a million examples of synthetic speech to prove, almost without a shadow of a doubt, that it was authentic. In the West Africa case, they couldn’t reach a definitive conclusion because of the challenges of analyzing audio from Twitter, and with background noise.

Challenges in Deepfake Detection

The third clip was leaked audio of a politician from India. Nilesh Christopher of “Rest of World” brought the case to the task force. The experts used almost an hour of samples to develop a personalized model of the politician’s authentic voice. Despite his loud and fast claims that it was all falsified with AI, experts concluded that it at least was partially real, not AI.

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As you can see, even experts cannot rapidly and conclusively separate true from false, and the ease of calling “that’s deepfaked” on something real is increasing. The future is full of profound challenges, both in protecting the real and detecting the fake.

We’re already seeing the warning signs of this challenge of discerning fact from fiction. Audio and video deepfakes have targeted politicians, major political leaders in the EU, Turkey, and Mexico, and US mayoral candidates. Political ads are incorporating footage of events that never happened, and people are sharing AI-generated imagery from crisis zones, claiming it to be real.

Now, again, this problem is not entirely new. The human-rights defenders and journalists I work with are used to having their stories dismissed, and they’re used to widespread, deceptive, shallow fakes, videos and images taken from one context or time or place and claimed as if they’re in another, used to share confusion and spread disinformation.

The Impact on Society and the Need for Solutions

And of course, we live in a world that is full of partisanship and plentiful confirmation bias. Given all that, the last thing we need is a diminishing baseline of the shared, trustworthy information upon which democracies thrive, where the specter of AI is used to plausibly believe things you want to believe, and plausibly deny things you want to ignore.

But I think there’s a way we can prevent that future, if we act now; that if we “Prepare, Don’t Panic,” we’ll kind of make our way through this somehow. Panic won’t serve us well. It plays into the hands of governments and corporations who will abuse our fears, and into the hands of people who want a fog of confusion and will use AI as an excuse.

How many people were taken in, just for a minute, by the Pope in his dripped-out puffer jacket? You can admit it. More seriously, how many of you know someone who’s been scammed by an audio that sounds like their kid? And for those of you who are thinking “I wasn’t taken in, I know how to spot a deepfake,” any tip you know now is already outdated. Deepfakes didn’t blink, they do now. Six-fingered hands were more common in deepfake land than real life — not so much. Technical advances erase those visible and audible clues that we so desperately want to hang on to as proof we can discern real from fake.

The Necessity for Structural Solutions in Deepfake Detection

But it also really shouldn’t be on us to make that guess without any help.

Between real deepfakes and claimed deepfakes, we need big-picture, structural solutions. We need robust foundations that enable us to discern authentic from simulated, tools to fortify the credibility of critical voices and images, and powerful detection technology that doesn’t raise more doubts than it fixes.

There are three steps we need to take to get to that future. Step one is to ensure that the detection skills and tools are in the hands of the people who need them. I’ve talked to hundreds of journalists, community leaders, and human-rights defenders, and they’re in the same boat as you and me and us. They’re listening to the audio, trying to think, “Can I spot a glitch?” Looking at the image, saying, “Oh, does that look right or not?”

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Or maybe they’re going online to find a detector. And the detector they find, they don’t know whether they’re getting a false positive, a false negative, or a reliable result. Here’s an example. I used a detector, which got the Pope in the puffer jacket right. But then, when I put in the Easter bunny image that I made for my kids, it said that it was human-generated.

Enhancing Media Literacy and Authenticity in an AI-Infused World

This is because of some big challenges in deepfake detection. Detection tools often only work on one single way to make a deepfake, so you need multiple tools, and they don’t work well on low-quality social media content. Confidence score, 0.76-0.87, how do you know whether that’s reliable, if you don’t know if the underlying technology is reliable, or whether it works on the manipulation that is being used? And tools to spot an AI manipulation don’t spot a manual edit.

These tools also won’t be available to everyone. There’s a trade-off between security and access, which means if we make them available to anyone, they become useless to everybody, because the people designing the new deception techniques will test them on the publicly available detectors and evade them.

But we do need to make sure these are available to the journalists, the community leaders, the election officials, globally, who are our first line of defense, thought through with attention to real-world accessibility and use. Though at the best circumstances, detection tools will be 85 to 95 percent effective, they have to be in the hands of that first line of defense, and they’re not, right now.

So for step one, I’ve been talking about detection after the fact. Step two — AI is going to be everywhere in our communication, creating, changing, editing.

The Critical Role of Content Provenance and Metadata

It’s not going to be a simple binary of “yes, it’s AI” or “phew, it’s not.” AI is part of all of our communication, so we need to better understand the recipe of what we’re consuming. Some people call this content provenance and disclosure. Technologists have been building ways to add invisible watermarking to AI-generated media. They’ve also been designing ways — and I’ve been part of these efforts — within a standard called the C2PA, to add cryptographically signed metadata to files. This means data that provides details about the content, cryptographically signed in a way that reinforces our trust in that information.

It’s an updating record of how AI was used to create or edit it, where humans and other technologies were involved, and how it was distributed. It’s basically a recipe and serving instructions for the mix of AI and human that’s in what you’re seeing and hearing. And it’s a critical part of a new AI-infused media literacy. And this actually shouldn’t sound that crazy. Our communication is moving in this direction already. If you’re like me — you can admit it — you browse your TikTok “For You” page, and you’re used to seeing videos that have an audio source, an AI filter, a green screen, a background, a stitch with another edit.

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The Importance of Responsible AI Deployment and Government Oversight

This, in some sense, is the alpha version of this transparency in some of the major platforms we use today. It’s just that it does not yet travel across the internet, it’s not reliable, updatable, and it’s not secure.

Now, there are also big challenges in this type of infrastructure for authenticity. As we create these durable signs of how AI and human were mixed, that carry across the trajectory of how media is made, we need to ensure they don’t compromise privacy or backfire globally. We have to get this right. We can’t oblige a citizen journalist filming in a repressive context or a satirical maker using novel gen-AI tools to parody the powerful to have to disclose their identity or personally identifiable information in order to use their camera or ChatGPT.

Because it’s important they be able to retain their ability to have anonymity, at the same time as the tool to create is transparent. This needs to be about the how of AI-human media making, not the who.

Establishing a Pipeline of Responsibility in AI

This brings me to the final step. None of this works without a pipeline of responsibility that runs from the foundation models and the open-source projects through to the way that is deployed into systems, APIs, and apps, to the platforms where we consume media and communicate. I’ve spent much of the last 15 years fighting, essentially, a rearguard action, like so many of my colleagues in the human rights world, against the failures of social media. We can’t make those mistakes again in this next generation of technology.

What this means is that governments need to ensure that within this pipeline of responsibility for AI, there is transparency, accountability, and liability. Without these three steps — detection for the people who need it most, provenance that is rights-respecting and that pipeline of responsibility, we’re going to get stuck looking in vain for the six-fingered hand, or the eyes that don’t blink. We need to take these steps. Otherwise, we risk a world where it gets easier and easier to both fake reality and dismiss reality as potentially faked.

Concluding Thoughts on the Future of AI and Society

And that is a world that the political philosopher Hannah Arendt described in these terms: “A people that no longer can believe anything cannot make up its own mind. It is deprived not only of its capacity to act but also of its capacity to think and to judge. And with such a people you can then do what you please.” That’s a world I know none of us want, that I think we can prevent.

Thanks.

When AI Can Fake Reality, Who Can You Trust? – Sam Gregory (Transcript)