CA2173481C - Recepteur cryptographique - Google Patents
Recepteur cryptographique Download PDFInfo
- Publication number
- CA2173481C CA2173481C CA002173481A CA2173481A CA2173481C CA 2173481 C CA2173481 C CA 2173481C CA 002173481 A CA002173481 A CA 002173481A CA 2173481 A CA2173481 A CA 2173481A CA 2173481 C CA2173481 C CA 2173481C
- Authority
- CA
- Canada
- Prior art keywords
- photon
- channel
- photons
- cryptographic
- receiver according
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000835 fiber Substances 0.000 claims abstract description 56
- 238000005259 measurement Methods 0.000 claims abstract description 33
- 230000010287 polarization Effects 0.000 claims description 43
- 230000001419 dependent effect Effects 0.000 claims description 3
- 238000001514 detection method Methods 0.000 claims description 3
- 239000013307 optical fiber Substances 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 11
- 230000010363 phase shift Effects 0.000 description 11
- 239000013078 crystal Substances 0.000 description 6
- 230000002596 correlated effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 230000000875 corresponding effect Effects 0.000 description 3
- WBPWDGRYHFQTRC-UHFFFAOYSA-N 2-ethoxycyclohexan-1-one Chemical compound CCOC1CCCCC1=O WBPWDGRYHFQTRC-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 229910052743 krypton Inorganic materials 0.000 description 1
- -1 krypton ion Chemical class 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0852—Quantum cryptography
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/70—Photonic quantum communication
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Optics & Photonics (AREA)
- Instruments For Measurement Of Length By Optical Means (AREA)
- Optical Communication System (AREA)
Abstract
Un récepteur cryptographique (10) comprend des détecteurs de photons (52, 54, 56, 58) disposés de manière à détecter les photons arrivant des filtres (22) et (24). Un dispositif de couplage de fibres (14) distribue au hasard chaque photon (16) reçu par une fibre optique vers l'un des deux canaux à photons (18, 20). Les filtres (22, 24) sont chacun des interféromètres Mach-Zehnder asymétriques dotés d'un modulateur de phase (34, 44) dans un bras (28, 38). Ces filtres (22, 24) affectent des bases de mesure non orthogonales aux photons dans les canaux respectifs (18, 20). Une unité de traitement de signaux (60) dérive un code cryptographique par analyse des signaux provenant des détecteurs de photons (52, 54, 56, 58).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB939320793A GB9320793D0 (en) | 1993-10-08 | 1993-10-08 | Cryptographic receiver |
| GB9320793.4 | 1993-10-08 | ||
| PCT/GB1994/002067 WO1995010907A1 (fr) | 1993-10-08 | 1994-09-23 | Recepteur cryptographique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2173481A1 CA2173481A1 (fr) | 1995-04-20 |
| CA2173481C true CA2173481C (fr) | 2006-12-05 |
Family
ID=37559015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002173481A Expired - Fee Related CA2173481C (fr) | 1993-10-08 | 1994-09-23 | Recepteur cryptographique |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2173481C (fr) |
-
1994
- 1994-09-23 CA CA002173481A patent/CA2173481C/fr not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CA2173481A1 (fr) | 1995-04-20 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |