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1701results about How to "Simple system" patented technology

Method and apparatus providing secure initialization of network devices using a cryptographic key distribution approach

Registration of non-configured network devices in a distributed network is facilitated by a method of distributing cryptographic keys. A non-configured first device seeking to communicate securely with a second device acquires knowledge of a trusted registration service. The first device registers with the registration service and obtains a longer-lived symmetric key. Using the longer-lived key, the first device authenticates itself to a key management service, and receives a shorter-lived symmetric key encapsulated in a ticket that includes policy information. A second device carries out the same preparatory process. Using its ticket containing the shorter-lived key, the first device requests the second device to obtain a session key on behalf of both. The second device presents its own ticket and that of the first device to the key management service to authenticate the shorter-lived key, and then obtains a session key for use in communications among the first and second devices. The first device and second device then communicate by encrypting communications with the session key, and without further contact with the key management or registration services or any other online authoritative server or key database. Thus newly deployed network devices may be positively identified, registered in the network, and subjected to key schedule or other key management policies.
Owner:CISCO TECH INC

Simultaneously desulfurization and denitration wet ammonia flue gas cleaning technology and system thereof

A wet ammonium flue gas cleaning process for desulfurizing and denitrifying and a system thereof are disclosed. The process oxidates NO in the flue gas to be NO2, makes SO2 and NO2 in the flue gas react with ammonium to product ammonium sulfite, ammonium nitrate and ammonium nitrite, then oxidates ammonium sulfite and ammonium nitrite therein to product the byproduct that is ammiaonia sulfate and ammonium nitrate, and lastly gets the clear flue gas after demisting to the desulfurizing and denitrifying flue gas. The system comprises a dust pre-collector, a hydrogen peroxide or ozone sprayer, and a desulfurizing and denitrifying tower, which are connected in turns, wherein ammonia replenishment system and an air feeding device are mounted at the bottom of the desulfurizing and denitrifying tower, sprinkling layer which can cycle sprinkle is mounted at the middle, and a demister is mounted at the upper. The invention has a simple process, a simplified system, a low investment and operation cost. The invention not only has a high efficiency in desulfurizing and denitrifying, but also a high utilance of desulfurizing and denitrifying absorbent, and byproduct of desulfurization and denitration can be utilized as chemical fertilizer of ammiaonia sulfate and ammonium nitrate.
Owner:WUHAN KAIDI ELECTRIC POWER ENVIRONMENTAL

Method and apparatus for detecting doubled bills in a currency handling device

A doubles detection system for detecting doubled documents. The system comprises one or more light sources disposed on a first side of a test document and one or more reflected light sensors disposed along the first side of the test document. The reflected light sensors are adapted to generate reflected light signals. The system also comprises one or more transmitted light sensors disposed along a second side of the test document which are adapted to generate transmitted light signals. The system also comprises a memory having a master reflected light value and a master transmitted light value stored therein. The system comprises a processor adapted to receive the reflected light signal, generate a reflected light value for the test document, and calculate a reflectance ratio between the reflected light value of the test document and a master reflected light value. The processor is also adapted to receive the transmitted light signal, generate a transmitted light value for the test document, and adjust the transmitted light value for the test document based on the reflectance ratio. The processor is adapted to compare the adjusted transmitted light value for the test document to the master transmitted light value and generate a doubles signal if the comparison of the adjusted transmitted light value for the test document with the master transmitted light value indicates that more than one document is present.
Owner:CUMMINS-ALLISON CORP
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