Nails provide one of the best clues to help determine the age of historic buildings, especially those constructed during the nineteenth century, when nail-making technology advanced rapidly. Until the last decade of the 1700s and the early 1800s, hand-wrought nails typically fastened the sheathing and roof boards on building frames.
BitLocker Overview:BitLocker is Microsoftâs full disk encryption solution, which protects all of your data from theft, hacking or loss. BitLocker does this by encrypting the entire drive that hosts your Windows operating system and all your data. BitLocker is available for all devices, including... more Â».
BitLocker is an operating system-level extension to Vista that combines on-disk encryption and special key management techniques. The data and the operating system installation are both protected by two-factor authentication, specifically, a hardware key used in conjunction with a long passphrase.