Secure identification method between two radiofrequency network appliances
First Claim
1. A process for secure recognition between two units of a radiofrequency network, comprising the following steps:
- (a) switching on said two units,(b) selecting one of said two units as a master unit, and the other unit as a slave unit,(c) moving said two units into immediate proximity with one another,(d) launching on said master unit an automatic secure recognition process, as follows;
(d1) transmitting signals, using a first radiation pattern of limited coverage, in such a way that the signals transmitted by the masterunit are only received by said slave unit,(d2) launching a standard connection process to said radiofrequency network and, in the case of successful connection to said radiofrequency network,(d3) generating a recognition key in one of said units for subsequent secure exchanges between said two units, and(d4) transmitting said recognition key from said one unit to the other of said units;
(e) moving said two units at a distance from each other for operation at a distance larger than the immediate proximity; and
(f) thereafter transmitting secure signals between said master unit and said slave unit, using said recognition key, by means of a second radiation pattern having a range of coverage larger than said first radiation pattern.
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Accused Products
Abstract
In a radiofrequency network, such as a Bluetooth network, two devices are securely identified to one another for a communication session. One of the devices is designated as a master apparatus, and the other is a slave apparatus. An automatic identification process is carried out by placing the two devices in close proximity with one another, and transmitting very short range signals from the master apparatus, to be exclusively received by the slave apparatus. If the two devices are able to communicate over this short range, an identification key is generated and passed to the slave apparatus for subsequent exchanges in normal, larger range communications.
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Citations
16 Claims
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1. A process for secure recognition between two units of a radiofrequency network, comprising the following steps:
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(a) switching on said two units, (b) selecting one of said two units as a master unit, and the other unit as a slave unit, (c) moving said two units into immediate proximity with one another, (d) launching on said master unit an automatic secure recognition process, as follows; (d1) transmitting signals, using a first radiation pattern of limited coverage, in such a way that the signals transmitted by the masterunit are only received by said slave unit, (d2) launching a standard connection process to said radiofrequency network and, in the case of successful connection to said radiofrequency network, (d3) generating a recognition key in one of said units for subsequent secure exchanges between said two units, and (d4) transmitting said recognition key from said one unit to the other of said units; (e) moving said two units at a distance from each other for operation at a distance larger than the immediate proximity; and (f) thereafter transmitting secure signals between said master unit and said slave unit, using said recognition key, by means of a second radiation pattern having a range of coverage larger than said first radiation pattern. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A master unit comprising a transmitter-receiver connected to a transmission-reception antenna to form a transmission-reception device for use in a radiofrequency network to communicate with at least one slave unit within said radiofrequency network,
wherein said master unit comprises means for modifying the range of the radiation pattern of the antenna, so as to have a first range and at least a second range smaller than said first range to establish a connection between said master unit and only said at least one slave unit within said radiofrequency network, when said at least one slave unit is in the immediate proximity of said master unit, wherein said master unit operates in a first mode to transmit a recognition key to said slave unit while utilizing said second, smaller range of the radiation pattern, and in a second mode to thereafter securely communicate with said slave unit using said recognition key, while utilizing said first radiation pattern for transmissions to said slave unit.
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13. A radiofrequency network communication device, comprising:
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means for transmitting an initial signal within a first, limited range to establish a connection with a unit in the immediate proximity of said device; means for generating a recognition key and providing said recognition key to a unit with which a connection has been established; and means for switching the transmission range of said transmitting means from said first, limited range to a second, larger range after said recognition key has been provided to the unit, for communicating with said unit using said recognition key. - View Dependent Claims (14, 15, 16)
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Specification