<sod>In May 1978 Sarfatti filed for a patent for a "faster-than-light quantum communication system," which would be able, he said, to transmit a human voice instantly across vast distances without any possibility of eavesdropping.<ref>Kaiser 2011, pp.&nbsp;197–202.</ref> That there could be no eavesdropping is now a feature of quantum cryptography, which did not exist in 1978. Sarfatti's research in this field has continued and is summarized here: <eod>
<sod>In May 1978 Sarfatti filed for a patent for a "faster-than-light quantum communication system," which would be able, he said, to transmit a human voice instantly across vast distances without any possibility of eavesdropping.<ref>Kaiser 2011, pp.&nbsp;197–202.</ref> That there could be no eavesdropping is now a feature of quantum cryptography, which did not exist in 1978. Sarfatti's research in this field has continued and is summarized here by John Walker: <eod>