Cloud storage giants Dropbox have added biometric security options in the new app it has developed for Windows 10.Because Dropbox will work with Windows Hello, a security layer in Windows 10, users can unlock account access through face, fingerprint or iris recognition rather than a password. The app was also developed as part of an expanded partnership with Microsoft. Windows hello integration has so far been implemented for the facial recognition used by the Surface Pro 4 and Surface Book, or fingerprint recognition in a range of laptops.Last October, Dropbox added a new level of biometric security to its iOS app by linking to Apple's Touch ID.