A 'single-photon server', producing a steady stream of single-photon pulses for up to half a minute, has been created by confining, cooling and controlling a neutral atom inside a tiny optical cavity.

https://www.pcworld.com/downloads/file/fid,45938/description.html offers a simple, free way to encrypt individual files. Right-click a file, a few files, or a folder ...

RAR is a common compression format that is used to reduce the file size of documents on the Internet. The RAR format supports multipart files, called volumes, that enable you to split a large file ...