That why this process is called on-the-fly encryption/decryption technique, and it works for all file types / information / data (not only for video files). This process continues, as the portion is being played, the media player begins loading another small bitwise portion of the video file from the TrueCrypt-encrypted disk to RAM or memory, and the process repeats. The decrypted portion of the video (stored in RAM) is then played by the media player or VLC player. While the portion is being loaded in RAM, TrueCrypt is automatically decrypting it (in RAM). The media player/ VLC player then begins loading a small bitwise initial portion of the video file from the TrueCrypt-encrypted disk to RAM (memory) in order to play it. If the user provides the correct password / encryption key and mounts (opens) the TrueCrypt disk,then after the user double clicks on the icon of the video file, the operating system launches the program associated with the file type – most of the time media player/ VLC player. Let’s take an example that there is an abc.flv video file stored on a TrueCrypt disk. For this process, we don’t need extra RAM / memory. It is like bitwise data which we are using, or which is currently being used. Here I want to say that the whole set of data is not stored in RAM at one time. After we use this data, the data encrypts and the memory becomes free for other uses. At this time data decrypts and stores in temp storage in memory or RAM. When we copy from a mounted TrueCrypt drive / volume, this process is just like copying from one storage disk to another storage disk. This entire process is without any user intervention. On-the-fly technique decrypts data when we have to use it and again encrypts data as soon as we are done with it. TrueCrypt is tool that encrypts data or information using on-the-fly technique.
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