BT and Toshiba launch quantum cryptography service BT and Toshiba are deploying a metro network secured by quantum key distribution (QKD), claiming this to be a world-first. This will connect customers across London, transmitting data between multiple physical locations over standard fiber optic links using quantum cryptography, which makes it impossible for hackers to intercept encryption and decryption keys in transit without detection. In the event of detection, new keys can be redistributed. The objective is to eliminate eavesdropping of encryption keys as a security vulnerability, although this does not avoid other potential threats associated for example with corrupt employees. Nonetheless, this offers hope for highly secure communications, with professional services group Ernst and Young (EY) announced as the first…