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VeraCrypt is a freeware utility used for on-the-fly encryption (OTFE). It can create a virtual encrypted disk within a file or encrypt a partition or (in Windows) the entire storage device with pre-boot authentication.
VeraCrypt is a fork of the discontinued TrueCrypt project. It was initially released on 22 June 2013 and has produced its latest release (version 1.23) on 12 September 2018. Many security improvements have been implemented and issues raised by TrueCrypt code audits have been fixed. VeraCrypt includes optimized implementations of cryptographic hash functions and ciphers which boost performance on modern CPUs.