42 results about "Cloaking" patented technology

A video cloaking system for actively detecting unwanted background details in response to user selections, and replacing all or portion of the background with user selected content, such as static scenes, animations, or video. The user can represent themselves as they see fit, while hiding the normal background and adding entertainment value. A web enabled content system is also described that is configured to overlay web obtained content for preprogrammed video or audio content when it synchronizes with it. The user can humorous or meaningful content added to the content they view of listen to. Numerous additional system and methods are described.

The present invention teaches methods and systems for blocking unauthorized access to cable modem configuration files stored on trivial file transfer protocol (TFTP) servers. Filenames are modified by the DHCP to incorporate an authentication key (and optional cloaking) prior to transmission to the cable modem. When the TFTP server receives a modified filename, it also generates an authentication key. The authentication keys must match in order for the cable modem to receive the configuration file requested. At a minimum, authentication keys depend upon the un-modified filename, the cable modem IP address and a “coordination pass phrase” known to the TFTP server and DHCP server, but not known to the cable modem. Variations include optional cloaking, various actions performed for non-matching authentication keys, selection of authentication key generating algorithm and inclusion of cable modem MAC address in the authentication key for all cable modems or for premium service customer cable modems.

The invention discloses a nano-crystal tombar thite ferrous absorbing material with good absorbing property and a preparation method thereof. The material is characterized in that the lanthanon with the weight percentage of 2% and 70%, the iron with the weight percentage of 5% and 98% and the little amount of doping element are smelted into tombar thite-ferrous alloy; the tombar thite-ferrous alloy is reacted with hydrogen by hydrogen decrepitation method under the temperature range from 0 to 700 DEG C, is broken into fine powder or be ball grinded into fine powder, and then is reacted with hydrogen to generate composite material of rare earths hydride (RHx) and Alpha-Fe under the temperature range from 100 DEG C to 1000 DEG C; finally, the composite material is oxidized, nitridized or oxidized and nitridized under low temperature to produce the composite material mainly being rare earth oxide or nitride/Alpha-Fe composite material. The material of the invention has the advantages of high absorbing capability, wide shield wave band, good anti-corrosion property, anti-oxidation property and low price, and can be used in the fields of electro-magnetic shielding in building, information and communication technical secrecy and military cloaking technique, and so on.

An inexpensive, efficient and lightweight integrated small decoy system towed behind an aircraft to power an intense IR emitter for drawing in a missile with an IR sensitive guidance system away from vulnerable parts of a defended aircraft is combined with a system for simultaneously cloaking the aircraft with spectral bands of atmospherically scattered UV solar radiation reflected, and radiated from UV radiant sources mounted on the aircraft to defend against advanced MANPADS missiles with guidance systems sensitive to UV shadows cast by an aircraft in a background sky radiance of atmospherically scattered solar UV. Both the reflected and direct cloaking UV emittance may be spatially and/or temporally modulated to confuse an incoming missile. The UV aspect of this invention may also be combined with other C-MANPADS missiles, such as DIRCM, to provide additional defensive capability.

The invention discloses a frequency selective surface in a combined guidance system of an active/passive radar, and belongs to the technical field of frequency selective surfaces. The frequency selective surface solves the technical problems in the prior art that a mixed-type FSS passive radar is small in working bandwidth, the active/passive radar is narrow in dual-band pass interval, and the radars cannot be used for the combined guidance system. The frequency selective surface provided by the invention comprises a plurality of metal paster units and a plurality of electric-control lumped elements, wherein the plurality of metal paster units are arranged periodically, any two adjacent metal paster units are connected through one electric-control lumped element, and the interior of each metal paster unit is provided with an opening. When the electric-control lumped elements are connected, the frequency selective surface has the high-pass filtering characteristic, can achieve the switching function of the passive radar which works at wide frequency band. When the electric-control lumped elements are disconnected, the frequency selective surface has the characteristic of wide-interval double-band pass. The frequency selective surface can be used for the cloaking of an antenna of an active/passive combined guidance weapon, and improves the viability and capacity of defense penetration of the active/passive combined guidance weapon.

The invention discloses a location privacy protection method based on location sensitivity and hot degree in a road network. The location privacy protection method comprises the steps that: S1, a credible proxy server is introduced between a mobile user and a service provider, wherein the proxy server is called an anonymous server; S2, the anonymous server receives a query based on a user's own exact location, takes the influence of hot degree and sensitivity of the location on a cloaking region into account, generates an appropriate cloaking region with higher privacy protection degree, and sends the cloaking region to the service provider; S3, and the service provider returns a candidate result data set according to the query based on fuzzy information sent by the anonymous server, and the anonymous server filters the result data set according to known exact information of the user and returns a most appropriate result to the user. The location privacy protection method considers the correlativity between hot degree and sensitivity of the location comprehensively, and prevents an attacker from conjecturing a sensitive location where the user has dwelled in the region according to dwell time of the user in the cloaking region.

The invention discloses a tunable unidirectional microwave cloaking device. The tunable unidirectional microwave cloaking device includes a first metal opening resonance ring array, a second metal opening resonance ring array, a plurality of variable capacitance diodes which correspondingly are arranged at the opening of each first metal opening resonance ring in the first metal opening resonance ring array and at the opening of each second metal opening resonance ring in the second metal opening resonance ring array, a direct-current voltage-stabilized power supply, and a controller, wherein the controller is used for controlling the output voltage of the direct-current voltage-stabilized power supply to regulate end voltage at two ends of each variable capacitance diode so as to change the capacitance values of the variable capacitance diodes, so that a frequency characteristic curve can be shifted. According to the cloaking device provided by the embodiment of the invention, control on electromagnetic wave transmission paths and phases can be realized through the resonance effects of the metal resonance rings, and obstacles in a cloaking region can be cloaked, and the frequency characteristic curve of the device can be shifted, so that the cloaking of electromagnetic wave waves in different frequency bands can be realized. The tunable unidirectional microwave cloaking device has the advantages of simple structure and easiness in control.

Systems and methods to produce cloaked keys and shared secret data are described. A first device may select a private key, for the first device, based on a first set of rewritten conjugates. The first device may receive a public key from a second device. The public key may be based on a private key of the second device. The private key of the second device may be based on a second set of rewritten conjugates. The first device may determine first and second cloaking elements based on the public key and the private key of the first device. The first device may produce a cloaked key based on the first and second cloaking elements, and the private key of the first device. The first device may produce shared secret data based on the private key of the first device and a second cloaked key from the second device.

A hybrid optical device for compressing light, including a first part which receives incident light shining on the device, wherein the first part is formed into sections along at least one direction thereof, wherein the sections receive respective portions of the light received by the first part, and individually compress and redirect the received portions of light, a second part which includes plural reflective surfaces which receive the compressed light from the sections of the first portion and further compress and redirect the portions of light, and a third part which receives the further compressed portions of light from the sections of the second part, and redirects same such that the light is output from the device.

A cloaking apparatus and method are disclosed herein. The cloaking apparatus for cloaking a target object using meta-material includes a compensation unit, and a cloaking cell. The compensation unit is disposed in a second space surrounding part of a first space including the target object, and is composed of a first meta-material having a predetermined negative refractive index. The cloaking shell is configured to surround part of the compensation unit, and is composed of a second meta-material. The negative refractive index may be a negative refractive index that is adapted to cloak the target object by compensating for the positive refractive index of the first space.

The invention relates to a method and a device for realizing the cloaking of a mobile terminal, wherein the method executed by a mobile switching center comprises the following steps of: receiving information from the other device and for requesting to provide passive service for the mobile terminal; acquiring the state information of the mobile terminal, which is stored at a network side; judging whether the mobile terminal is in a cloaking state or not on the basis of the acquired state information; and when a judgment result is positive, stopping providing the passive service for the mobile terminal. The method and the device for realizing the cloaking of the mobile terminal enable users not to receive the passive service under the condition of using active service.

Techniques are disclosed relating to methods that include a process, executing on a computer system, receiving a request to access a website, and altering the request to include one or more characteristics of anti-malware scanners. The method further includes the process sending the altered request to the website, and receiving a response to the altered request. The method also includes the process detecting whether the received response utilizes one of a known set of anti-malware cloaking techniques, and providing, based on the detecting, an output indicative of an outcome of the altered request.

In an electromagnetic cloaking structure, a refractive index distribution has a high refractive index region which is provided around a shielding space and has a maximum value in a plane surrounding the shielding space and in which a refractive index decreases gradually from the centroid of the shielding space along a radial line passing through the plane so as to be close to an average refractive index and a low refractive index region which has a minimum value at two points having the shielding space and the high refractive index region interposed therebetween on a virtual optical axis passing through the shielding space and in which the refractive index increases gradually from the two points in a direction opposite to the high refractive index region on the virtual optical axes, on which the two points are placed, so as to be close to the average refractive index.

A cloaked field sensor apparatus and system using a cloaking barrier sheath to substantially enclose the surface of a transmitter conduit exposed to an electromagnetic field being measured to reduce the field sensor's interference with the electromagnetic field being measured. Multiple cloaked field sensor apparatuses may be aligned in an array and use identical or different cloaking barrier sheaths.