A new web app that lets users create realistic-looking nude images of women offers a terrifying glimpse into how deepfake technology can now be easily used for malicious purposes like revenge porn and bullying.

Up until now, most deepfake technology and software requires uploading vast amounts of video footage of the subject in order to train the AI to create realistic-looking yet false depictions of the person saying or doing something.

But DeepNude, which was first discovered by Motherboard , makes generating fake nude images a one-click process: All someone would have to do is upload a photo of any woman (it reportedly doesn't generate male nudes), and let the software do the work.

All the images created with the free version DeepNude are produced with a watermark by default, but Motherboard was able to easily remove it to get the un-marked image. The website sells access to a premium version of the software for $50 that removes the watermark, and requires a software download that's compatible with Windows 10 and Linux devices. The software only generates doctored images, not videos, of women, but it's the low barrier to entry that makes the app problematic.

DeepNude is just the latest example in how techies have been using artificial intelligence to create deepfakes , eerily realistic fake depictions of someone doing or saying something they have never done. Some have used the technology to create computer-generated cats , Airbnb listings, and revised versions of famous Hollywood movies . But others have used the technology to effortlessly spread misinformation, like this deepfake video of Alexandria Ocasio-Cortez , which was altered to make the senator seem like she doesn't know the answers to questions from an interviewer.

Read more: From porn to 'Game of Thrones': How deepfakes and realistic-looking fake videos hit it big

So while deepfake tech has serious implications for the spread of false news and disinformation, DeepNude shows how quickly the technology has evolved to make it ever-easier for non-technically savvy people to create realistic-enough content that could then be used for blackmail and bullying purposes, especially when it comes to women. Deepfake technology has already been used for revenge porn targeting anyone from people's friends to their classmates , in addition to fueling fake nude videos of celebrities like Scarlett Johansson .

As Johansson experienced firsthand last year when her face was superimposed into porn videos , it doesn't matter how much you deny that the nude footage isn't actually of you.

"The fact is that trying to protect yourself from the internet and its depravity is basically a lost cause," Johansson told the Post in December . "The internet is a vast wormhole of darkness that eats itself."

DeepNude brings the ability to make believable revenge porn to the masses, something a revenge porn activist told Motherboard is "absolutely terrifying," and should not be available for public use.

But Alberto, a developer behind DeepNude, defended himself to Motherboard: "I'm not a voyeur, I'm a technology enthusiast."

Alberto told Motherboard his software is based off pix2pix , an open-source algorithm used for "image-to-image translation." Pix2pix and other deepfake software use something called a generative adversarial network (a GAN), an algorithm that spits out iterations of fake depictions that were successfully able to trick a computer into thinking the image was legit.

Business Insider was unable to test out the app ourselves, because the DeepNude servers are offline. On its website and social media, DeepNude says the team "did not expect these traffic and our servers need reinforcement," and is working to get the app back online "in a few days."

But people have already downloaded the software, and this could very well mark the beginning of incredibly easy access to technology with terrifying implications.

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