Deepfakes: Nothing Is True, Everything Is Permitted

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H+ WEEKLY

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Issue #402

"Never trust anything you see on the internet" - Abraham Lincoln

The history of deepfakes starts in 1997 with Video Rewrite, created by Christoph Bregler, Michele Covell, and Malcolm Slaney. It was the first-ever computer program to fully automate the process of facial re-animation. The next improvement in quality came in 2001 with the active appearance model.

Nothing much happened in the space until the introduction of generative adversarial networks (GANs) by Ian Goodfellow in 2014. GANs consist of two neural networks - one network is generating an image, and the second one evaluates the image. When an image is rejected by the second network, the first one learns from it and adjusts itself. Repeat this process a couple thousand or million times, and you get an AI that can generate images almost indistinguishable from real ones.

The AI community took on the idea of GANs and started experimenting with them. In 2016, Face2Face has been released. One might put this as the beginning of the modern deepfakes. Face2Face was the first program to allow a real-time face swap in videos. It made waves in the AI community and inspired more research into face swaps and deepfakes.

The general public first learned about deepfakes in 2017 with this infamous Obama deepfake video from Buzzfeed. From there, the deepfake technology became better, cheaper and more accessible. If you have a good enough computer, you can run one yourself. If not, there are online services available.

Like every technology, deepfakes can be used for good and for bad. For example, BBC used deepfakes to hide the identities of Hong Kong protesters in their documentary. Deepfakes found their use in the movie industry. A good example of that is Disney, which used old-school (before GANs) deepfake technology to bring back Peter Cushing (who died in 1994) to "play" Grand Moff Tarkin in Rogue One. The same technique was also used in the last scene of the movie to recreate young Carrie Fisher as Princess Leia.

And just to illustrate how good and accessible GAN-based deepfakes are, just three years later after Rogue One was released, one person was capable of creating a better deepfake Tarkin than the entire Industrial Light and Magic.

These days, however, deepfakes are portrayed as a tool for misinformation and abuse. 4chan users used a deepfake voice service to make celebrities say racist, transphobic, and violent things. We have had fake Zelensky and fake Putin calling to surrender or offer peace talks respectively. And just recently, a well-known streamer got caught using a service offering deepfaked porn videos with female streamers.

It's not just famous who are the target of deepfakes. It is very easy to deepfake someone into revenge porn, put that on the internet and destroy someone's life and career. All that is needed is enough photos of the target person. Microsoft has an AI that can clone any voice from a short, 3-second-long sample. Just one voice note and someone can pretend to be your friend or family member.

The question then is, how do we detect deepfakes? The best summary I've found is this paper published in February 2022 analysing different detection methods, from deep-learning-based to blockchain-based. Some of the examined methods report a 98% detection rate but are highly sensitive to the training data. With some tweaks, the detection rate goes to 99% and solves the sensitivity problem.

The battle between deepfake generators and deepfake detectors will the going on. What we can do in the meantime is to be sceptical about anything we see on the internet, and double-check if what we see is real.

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ARTIFICIAL INTELLIGENCE

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BIOTECHNOLOGY

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This issue was brought to you by our awesome patrons whmr, Floris, Eric, Andrew, dux and Tom! You too can support the newsletter on Patreon.

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Conrad Gray (@conradthegray)

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Deepfakes: Nothing Is True, Everything Is Permitted - H+ Weekly - Issue #402