Face recognition technology can be used to gain access to a person's private data, according to a new study. Researchers at Carnegie Mellon University combined image scanning, cloud computing and public profiles from social network sites to identify individuals in the offline world. Data captured even included a user's social security number. Experts have warned of the privacy risks faced by the increased merging of online and offline identities. The researchers have also developed an 'augmented reality' mobile app that can display personal data over a person's image captured on a smartphone screen. Since these technologies are widely available, users' future identities may become exposed to anyone with a smartphone and an internet connection. Researchers believe this could force a reconsideration of future attitudes to privacy.