ECCouncil 212-81 Practice Test 1
Software for maintaining an on-the-fly-encrypted volume. Data is automatically encrypted right before it is saved, then decrypted right after it is loaded, all w/o user intervention.
VeraCrypt
https://en.wikipedia.org/wiki/VeraCrypt
VeraCrypt is a source-available 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.
Incorrect answers:
PGP - designed by Phil Zimmerman as a freeware e-mail security program and was released in 1991. It was the first widespread public key encryption program.
VPN - A virtual private network (VPN) extends a private network across a public network and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network. Applications running across a VPN may therefore benefit from the functionality, security, and management of the private network. Encryption is a common, although not an inherent, part of a VPN connection
Cryptool - an open-source project that focuses on the free e-learning software CrypTool illustrating cryptographic and cryptanalytic concepts. According to 'Hakin9', CrypTool is worldwide the most widespread e-learning software in the field of cryptology.