发明名称 |
Method and apparatus for free-space quantum key distribution in daylight |
摘要 |
A quantum cryptography apparatus securely generates a key to be used for secure transmission between a sender and a receiver connected by an atmospheric transmission link. A first laser outputs a timing bright light pulse; other lasers output polarized optical data pulses after having been enabled by a random bit generator. Output optics transmit output light from the lasers that is received by receiving optics. A first beam splitter receives light from the receiving optics, where a received timing bright light pulse is directed to a delay circuit for establishing a timing window for receiving light from the lasers and where an optical data pulse from one of the lasers has a probability of being either transmitted by the beam splitter or reflected by the beam splitter. A first polarizer receives transmitted optical data pulses to output one data bit value and a second polarizer receives reflected optical data pulses to output a second data bit value. A computer receives pulses representing receipt of a timing bright timing pulse and the first and second data bit values, where receipt of the first and second data bit values is indexed by the bright timing pulse. |
申请公布号 |
AU8285201(A) |
申请公布日期 |
2001.11.20 |
申请号 |
AU20010082852 |
申请日期 |
2001.04.27 |
申请人 |
THE REGENTS OF THE UNIVERSITY OF CALIFORNIA, |
发明人 |
RICHARD J. HUGHES;WILLIAM T. BUTTLER;PAUL G. KWIAT;GEORGE L. MORGAN;JANE E. NORDHOLT;C. GLEN PETERSON |
分类号 |
H04L9/08 |
主分类号 |
H04L9/08 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|