Abstract: A method of verifying integrity of an Internet of Things (IoT) system including a hub device and a plurality of end-node devices includes: determining, by the hub device, a root device among the plurality of end-node devices; receiving, by the hub device, from the root device at least one root message authentication code generated based on a result of verifying integrity of a sub-tree of the root device, wherein the sub-tree of the root device comprises a subset of the plurality of end-node devices subordinate to the root device; and verifying, by the hub device, the at least one root message authentication code.

Abstract: The present invention relates to a metal oxide powder, a method of preparing the same, and a lithium secondary battery using the same, which comprises: a metal oxide powder is represented by Formula (1), Lix(M1-m-zAmDz)Ot??Formula (1) in the above Formula (1), 0.85?x?1.2, 0?m?0.01, 0<z?0.04, 1.85?t?2.2, M is selected from the group consisting of Ni, Co, Mn and combinations thereof, A is selected from the group consisting of Mg, Ca, Sr, Ba and combinations thereof, D is selected from the group consisting of Ti, Zr, Ce, Ge, Sn and combinations thereof, and E is an average oxidation number of A and D, and E>3.5.

Abstract: There are provided a cathode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery containing the same. The cathode active material for a lithium secondary battery includes: a core made of a compound reversibly intercalating and deintercalating lithium; and a coating layer positioned on at least a portion of a surface of the compound, wherein the coating layer is a composite coating layer containing Li3PO4 and LiF, and further containing a lithium metal compound, a metal oxide, a metal fluoride compound, and/or a combination thereof, and the core is doped with fluorine.

Abstract: An electronic device includes: a processor configured to obtain a first authentication key based on first data and a first authentication message, verify the first authentication message based on the first authentication key, obtain a second authentication key based on second data and a second authentication message, and verify the second authentication message based on the second authentication key; and a memory configured to store the first data, the first authentication message, the first authentication key, the second data, the second authentication message, and the second authentication key, wherein the second authentication message and the second authentication key are different from the first authentication message and the first authentication key, respectively, and the first authentication key and the second authentication key are associated with a first end device and a second end device, respectively.

Abstract: In a method of performing secure communication between at least two devices, a first security session is formed between a first device and a second device while the first device operates in a secure mode. The first security session is formed by performing a handshake operation between the first device and the second device. Session information and a master key are stored into a secure element included in the first device. The session information and the master key are generated by forming the first security session. A second security session is formed between the first device and the second device while the first device operates in a normal mode. The second security session is formed without the handshake operation and by loading the session information stored in the secure element. Encoded data is exchanged by the first device and the second device through the second security session based on the master key stored in the secure element.

Abstract: Disclosed are a method for preparing a positive electrode active material for a lithium secondary battery and a positive electrode active material for a lithium secondary battery, the method including: preparing a mixture of a precursor represented by Chemical Formula 1 below, a lithium composite oxide represented by Chemical Formula 2 below and capable of intercalating/deintercalating lithium ions, and a lithium feed material; and firing the prepared mixture: A(OH)2-a ??[Chemical Formula 1] Li[LizA(1-z-a)Da]EbO2-b ??[Chemical Formula 2]

Abstract: Provided is a positive active material for a lithium secondary battery, which is a compound capable of reversible intercalation and deintercalation of lithium and having secondary particles formed by the aggregation of primary particles, wherein the size of crystal grains is between 0.0593 and 0.0610 ?m at a (003) peak in the spectrum analysis of X-ray diffraction analysis.

Abstract: A method for operating an electronic device is provided. The method includes generating, by an authentication agent, a digital fingerprint of an application, transmitting, by an authentication agent, the generated digital fingerprint to a trusted application on a trusted execution environment (TEE), verifying, by the trusted application, the digital fingerprint, and permitting, by the trusted application, the application to access a secure storage, when the trusted application succeeds in verifying the digital fingerprint.

Abstract: A positive active material for a rechargeable lithium battery, a method for manufacturing the same, and a rechargeable lithium battery including the same are provided. A positive active material for a rechargeable lithium battery includes a compound that is capable of reversibly intercalating or deintercalating lithium, wherein the compound is formed of a core portion and a coating layer, the core portion is doped with M, and the coating layer includes Al and B, wherein M is Zr, Ti, Mg, Ca, Al, B, V, Zn, Mo, Ni, Co, Mn, or a combination thereof.

Abstract: A method of operating a hub used in an internet of things (IoT) network system which includes a first controller and an IoT device is provided. The method includes: performing secure pairing with the first controller using a first communication, receiving first information related to the IoT device from the first controller paired with the hub, authenticating the first controller using the first information, and performing secure pairing with the IoT device using a second communication.

Abstract: There are provided a cathode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery containing the same. The cathode active material for a lithium secondary battery includes: a compound reversibly intercalating and deintercalating lithium; and a coating layer positioned on at least a portion of a surface of the compound, wherein the coating layer is a composite coating layer containing Li3PO4 and further containing a lithium metal oxide, a metal oxide, and/or a combination thereof, the lithium metal oxide or the metal oxide containing Zr.

Abstract: There are provided a cathode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery containing the same. The cathode active material for a lithium secondary battery includes: a core made of a compound reversibly intercalating and deintercalating lithium; and a coating layer positioned on at least a portion of a surface of the compound, wherein the coating layer is a composite coating layer containing Li3PO4 and LiF, and further containing a lithium metal compound, a metal oxide, a metal fluoride compound, and/or a combination thereof, and the core is doped with fluorine.

Abstract: There are provided a cathode active material for a lithium secondary battery, a method of preparing the same, and a lithium secondary battery containing the same. The cathode active material for a lithium secondary battery includes: a compound reversibly intercalating and deintercalating lithium; and a coating layer positioned on at least a portion of a surface of the compound, wherein the coating layer is a composite coating layer containing Li3PO4 and LiF, and further containing a lithium metal compound, a metal oxide, a metal fluoride compound, and/or a combination thereof.

Abstract: Disclosed are a method for preparing a positive electrode active material for a lithium secondary battery and a positive electrode active material for a lithium secondary battery, the method including: preparing a mixture of a precursor represented by Chemical Formula 1 below, a lithium composite oxide represented by Chemical Formula 2 below and capable of intercalating/deintercalating lithium ions, and a lithium feed material; and firing the prepared mixture: A(OH)2-a ??[Chemical Formula 1] Li[LizA(1-z-a)Da]EbO2-b ??[Chemical Formula 2]

Abstract: A cathode active material for a rechargeable lithium battery and a rechargeable lithium battery including the same, wherein the cathode active material includes a compound being capable of intercalating and deintercallating lithium, wherein the compound consists of a core part and a coating layer, and the core part is doped with M1 and M2 while the coating layer includes B, are provided. The M1 and M2 are independently at least one metal selected from Zr, Ti, Mg, Ca, V, Zn, Mo, Ni, Co, and Mn, and M1 and M2 are different.

Abstract: The present invention relates to a mounting structure for a direct injection fuel rail. Specifically, a mounting structure 120 for a direct injection fuel rail comprises a mount unit 124 and an injector cup 122 combined with a main pipe 110, wherein the injector cup 122 and the mount unit 124 are connected to and integrated with each other via a bridge 126, wherein the injector cup 122 is bonded to the main pipe 110, and wherein the mount unit 124 is separated from the main pipe 110. As such, concentration of stress due to displacement may be prevented, resistance against fatigue fracture may be increased, thermal deformation and additional concentration of stress may be prevented, manufacturability may be improved, and precise assembling positions may be easily ensured.

Abstract: Disclosed are a method for preparing a positive electrode active material for a lithium secondary battery and a positive electrode active material for a lithium secondary battery, the method including: preparing a mixture of a precursor represented by Chemical Formula 1 below, a lithium composite oxide represented by Chemical Formula 2 below and capable of intercalating/deintercalating lithium ions, and a lithium feed material; and firing the prepared mixture: A(OH)2-a??[Chemical Formula 1] Li[LizA(1-z-a)Da]EbO2-b??[Chemical Formula 2]

Abstract: Disclosed are a method for preparing a positive electrode active material for a lithium secondary battery and a positive electrode active material for a lithium secondary battery, the method including: preparing a mixture of a precursor represented by Chemical Formula 1 below, a lithium composite oxide represented by Chemical Formula 2 below and capable of intercalating/deintercalating lithium ions, and a lithium feed material; and firing the prepared mixture: A(OH)2-a??[Chemical Formula 1] Li[LizA(1-z-a)Da]EbO2-b??[Chemical Formula 2]

Abstract: A method for preparing a cathode active material for a lithium secondary battery is provided. The preparing method includes: adding a phosphorus compound to a transition metal oxide dispersion liquid to prepare a coating liquid; drying the coating liquid to prepare a powder including phosphorus oxide coated on the surface of the transition metal oxide; and dry-mixing the powder coated with the phosphorus oxide with a lithium intercalation compound, and then firing the mixture to form a solid solution compound of L1-M1-M2-P—O (where M1 is a transition metal derived from transition metal oxide, and M2 is a metal derived from lithium intercalation compound) on the surface of the lithium intercalation compound. The method for preparing a cathode active material for a lithium secondary battery simplifies the conventional preparing process to save process cost, and it provides comparable electrochemical characteristics to a cathode active material obtained from a wet process.

Abstract: The present invention relates to a positive active material for a rechargeable lithium battery, a method of preparing the same, and a rechargeable lithium battery including the same. More particularly, the present invention relates to a positive active material for a rechargeable lithium battery including a compound that can reversibly intercalate/deintercalate lithium and a lithium metal phosphate produced through binding with lithium of the compoound, the lithium metal phosphate existing from the surface of the compound to a predetermined depth, a method of preparing the positive active material, and a rechargeable lithium battery having the positive active material. The positive active material can accomplish excellent cycle-life characteristic and also, suppress battery swelling at a high temperature.