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| Summary / Description | This journal article discusses about the concept of using location for the purpose of data access control. The concept can then be adapted easily by someone skilled in the art of security system to be used in a railway network setting. |
| Type of Prior Art | Issued Patents - US |
| Country | United States of America |
| Patent/Application # | 5243652 |
| Kind Code | United States (US) - United STATES Patent - A |
| Patentee Name | Melvin J. Teare, Framingham; Stephen S. Walker, Marlborough |
| Relevant Pages, Columns, or Lines | |
| URL | http://patft.uspto.gov/netacgi/... |
| Filing Date | September 30, 1992 |
| Additional Information | |
| Notes | |
Excerpt A communication system includes a remote mobile node which acquires time-correlated data of its actual position from a global positional system (GPS), and securely transmits the information as a position history to a central facility. The mobile node includes encrypted programming material such as copyrighted video. At the central facility, a comparison is made between the received position history and predetermined signature data representing acceptable time-position histories. If a positive match is detected, a decryption key associated with the matched history is forwarded to the mobile node for decoding of the encrypted programming material. |
A method for accessing a wireless railroad data network (25) comprising: sensing presence of a rail vehicle on a rail track (12); authenticating the rail vehicle to gain temporary access to the wireless railroad data network (25) based on sensed presence of the rail vehicle on the rail track (12 and permitting temporary access by the rail vehicle to the wireless railroad data network (25) based on sensed presence and authentication of the rail vehicle.
| Relevance | The physical location determined via GPS as described in the prior art corresponds to sensing the presence of a rail vehicle on a railway. Access is only granted to clients which are located at specific locations. |
The method of claim 1, wherein permitting temporary access to the wireless railroad data network (25) comprises allocating a temporal access window for accessing the wireless railroad data network (25).
| Relevance | In the prior art, access to data is also temporal in the sense that it will be revoked as soon as the client leaves the "access zone". |
A method for accessing a wireless railroad data network (25) comprising: sensing presence of a rail vehicle on a rail track (12); authenticating the rail vehicle to gain temporary access to the wireless railroad data network (25) based on sensed presence of the rail vehicle on the rail track (12); and permitting temporary access to the wireless railroad data network (25) base on sensed presence and authentication of the rail vehicle; wherein permitting temporary access to the wireless railroad data network (25) comprises allocating a temporal access window for accessing the wireless railroad data network (25).
| Relevance | The physical location determined via GPS as described in the prior art corresponds to sensing the presence of a rail vehicle on a railway. Access is only granted to clients which are located at specific locations. |
United States