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Location-based security is ensured by using quantum mechanicsA research group led by computer scientists at the UCLA Henry Samueli School of Engineering and Applied Science has proved that cryptography ? the practice and study of hiding information ? that is based solely on physical location is possible by using quantum mechanics.Such a method, the researchers say, allows one to encrypt and decrypt data at a secure location without pre-sharing any cryptographic keys that can be used to lock or unlock sensitive information.The idea behind location-based cryptography is that only a recipient at a precise geographic location can receive an encrypted message ? the location itself acts as the credential required for generating an encryption key.This type of cryptography could be useful in several settings. For example, one could communicate with a military base with a guarantee that only someone physically present at the base will have access to the information. Furthermore, the location-based method eliminates th