Tag Archives: videos

List of Old NSA Training Videos

Post Syndicated from Bruce Schneier original https://www.schneier.com/blog/archives/2024/09/list-of-old-nsa-training-videos.html

The NSA’s “National Cryptographic School Television Catalogue” from 1991 lists about 600 COMSEC and SIGINT training videos.

There are a bunch explaining the operations of various cryptographic equipment, and a few code words I have never heard of before.

Adm. Grace Hopper’s 1982 NSA Lecture Has Been Published

Post Syndicated from Bruce Schneier original https://www.schneier.com/blog/archives/2024/08/adm-grace-hoppers-1982-nsa-lecture-has-been-published.html

The “long lost lecture” by Adm. Grace Hopper has been published by the NSA. (Note that there are two parts.)

It’s a wonderful talk: funny, engaging, wise, prescient. Remember that talk was given in 1982, less than a year before the ARPANET switched to TCP/IP and the internet went operational. She was a remarkable person.

Listening to it, and thinking about the audience of NSA engineers, I wonder how much of what she’s talking about as the future of computing—miniaturization, parallelization—was being done in the present and in secret.

New Research in Detecting AI-Generated Videos

Post Syndicated from Bruce Schneier original https://www.schneier.com/blog/archives/2024/07/new-research-in-detecting-ai-generated-videos.html

The latest in what will be a continuing arms race between creating and detecting videos:

The new tool the research project is unleashing on deepfakes, called “MISLnet”, evolved from years of data derived from detecting fake images and video with tools that spot changes made to digital video or images. These may include the addition or movement of pixels between frames, manipulation of the speed of the clip, or the removal of frames.

Such tools work because a digital camera’s algorithmic processing creates relationships between pixel color values. Those relationships between values are very different in user-generated or images edited with apps like Photoshop.

But because AI-generated videos aren’t produced by a camera capturing a real scene or image, they don’t contain those telltale disparities between pixel values.

The Drexel team’s tools, including MISLnet, learn using a method called a constrained neural network, which can differentiate between normal and unusual values at the sub-pixel level of images or video clips, rather than searching for the common indicators of image manipulation like those mentioned above.

Research paper.

Google Is Not Deleting Old YouTube Videos

Post Syndicated from Bruce Schneier original https://www.schneier.com/blog/archives/2023/05/google-is-not-deleting-old-youtube-videos.html

Google has backtracked on its plan to delete inactive YouTube videos—at least for now. Of course, it could change its mind anytime it wants.

It would be nice if this would get people to think about the vulnerabilities inherent in letting a for-profit monopoly decide what of human creativity is worth saving.