TrueCrypt is an open-source disk encryption software that was first released in 2004. It allows users to create a virtual encrypted disk within a file or to encrypt an entire partition or storage device. The software provides on-the-fly encryption, meaning that data is automatically encrypted and decrypted transparently as it is written to or read from the disk. Key features of TrueCrypt include: 1. **Volume Creation**: Users can create encrypted volumes (containers) that can be mounted as virtual disks.
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