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A scene from the film Disclosure showing its virtual reality interface, including a 3D file system visualizer.

A Google Tech Talk by Steve Weis that introduces modern cryptography and its use in practice and at Google. It covers proofs of security and security definitions and a special topic. HN commenters treat it as a talk on verifiable electronic voting.

A short Princeton CITP video describing cold boot attacks, where encryption keys remain in DRAM after power loss and can be recovered. It covers the attack against disk encryption such as BitLocker, FileVault and TrueCrypt.

A four-minute 2006 explainer on trusted computing, describing what it is and whether users should support it, with a skeptical DRM angle.

A WiebeTech marketing demo of HotPlug, a device that moves a running computer onto battery or another power source so it can be transported without shutting down.

A short CSI clip in which characters try to track a killer's IP address by writing a Visual Basic GUI. It is a famous example of absurd TV hacking.

Ted Nelson demonstrates Xanadu Space, his software for representing hypertext in three-dimensional space with linked, referenced content fragments.