VeraCrypt is made by a company specialized in encryption and security, called Idrix. They continue the development of TrueCrypt, a well known encryption program. This tool allows you to restrict the access to a partition of your hard disk by setting a password and makes really hard to be found with common brute force programs.
This tool can format the hard drive to be sure that no virus or trojan is installed in the background. It is able to use different encryption algorithms.