A team of researchers at MIT have figured out how to partially compromise quantum cryptography systems through a creative interpretation of the entanglement principle. In a system protected with quantum cryptographic principles, bits of information are encoded by assigning meaning to the polarisation of individual photons of light (up-down could mean a one, left-right could mean a zero) and thus exchange keying material. The very act of observing quantum particles changes their properties and thus destroys the data encoded in the particles, so in theory an eavesdropper Somewhere Out There listening in would corrupt the stream of data by damaging …