Patent application number | Description | Published |
20090034742 | IDENTITY-BASED ENCRYPTION SYSTEM - A system is provided that uses identity-based encryption to support secure communications. Messages from a sender to a receiver may be encrypted using the receiver's identity and public parameters that have been generated by a private key generator associated with the receiver. The private key generator associated with the receiver generates a private key for the receiver. The encrypted message may be decrypted by the receiver using the receiver's private key. The system may have multiple private key generators, each with a separate set of public parameters. Directory services may be used to provide a sender that is associated with one private key generator with appropriate public parameters to use when encrypting messages for a receiver that is associated with a different private key generator. A certification authority may be used to sign directory entries for the directory service. A clearinghouse may be used to avoid duplicative directory entries. | 02-05-2009 |
20090172804 | IDENTITY-BASED-ENCRYPTION MESSAGE MANAGEMENT SYSTEM - Systems and methods for managing email are provided. Some of the email may be encrypted using identity-based-encryption (IBE) techniques. When an incoming IBE-encrypted message for a recipient in an organization is received by a gateway at the organization, the gateway may request an IBE private key from an IBE private key generator. The IBE private key generator may generate the requested IBE private key for the gateway. The gateway may use an IBE decryption engine to decrypt the incoming message. The decrypted message can be scanned for viruses and spam and delivered to the recipient. Outgoing email messages can also be processed. If indicated by message attributes or information provided by a message sender, an outgoing message can be encrypted using an IBE encryption engine and the IBE public key of a desired recipient. | 07-02-2009 |
20090307497 | IDENTITY-BASED-ENCRYPTION MESSAGING SYSTEM - A system is provided that uses identity-based encryption to support secure communications between senders and recipients over a communications network. Private key generators are used to provide public parameter information. Senders encrypt messages for recipients using public keys based on recipient identities and using the public parameter information as inputs to an identity-based encryption algorithm. Recipients use private keys to decrypt the messages. There may be multiple private key generators in the system and a given recipient may have multiple private keys. Senders can include private key identifying information in the messages they send to recipients. The private key identifying information may be used by the recipients to determine which of their private keys to use in decrypting a message. Recipients may obtain the correct private key to use to decrypt a message from a local database of private keys or from an appropriate private key server. | 12-10-2009 |
20090327731 | SECURITY DEVICE FOR CRYPTOGRAPHIC COMMUNICATIONS - Cryptographic systems and methods are provided in which authentication operations, digital signature operations, and encryption operations may be performed. Authentication operations may be performed using authentication information. The authentication information may be constructed using a symmetric authentication key or a public/private pair of authentication keys. Users may digitally sign data using private signing keys. Corresponding public signing keys may be used to verify user signatures. Identity-based-encryption (IBE) arrangements may be used for encrypting messages using the identity of a recipient. IBE-encrypted messages may be decrypted using appropriate IBE private keys. A smart card, universal serial bus key, or other security device having a tamper-proof enclosure may use the authentication information to obtain secret key information. Information such as IBE private key information, private signature key information, and authentication information may be stored in the tamper-proof enclosure. | 12-31-2009 |
20100161984 | SECURE MESSAGE SYSTEM WITH REMOTE DECRYPTION SERVICE - Systems and methods for secure messaging are provided. A sender may encrypt content and send the encrypted content to a recipient over a communications network. The encrypted content may be decrypted for the recipient using a remote decryption service. Encrypted message content may be placed into a markup language form. Encrypted content may be incorporated into the form as a hidden form element. Form elements for collecting recipient credential information such as username and password information may also be incorporated into the form. At the recipient, the recipient may use the form to provide recipient credential information to the remote decryption service. The recipient may also use the form to upload the encrypted content from the form to the decryption service. The decryption service may provide the recipient with access to a decrypted version of the uploaded content over the communications network. | 06-24-2010 |
20120023571 | IDENTITY-BASED-ENCRYPTION MESSAGE MANAGEMENT SYSTEM - Systems and methods for managing email are provided. Some of the email may be encrypted using identity-based-encryption (IBE) techniques. When an incoming IBE-encrypted message for a recipient in an organization is received by a gateway at the organization, the gateway may request an IBE private key from an IBE private key generator. The IBE private key generator may generate the requested IBE private key for the gateway. The gateway may use an IBE decryption engine to decrypt the incoming message. The decrypted message can be scanned for viruses and spam and delivered to the recipient. Outgoing email messages can also be processed. If indicated by message attributes or information provided by a message sender, an outgoing message can be encrypted using an IBE encryption engine and the IBE public key of a desired recipient. | 01-26-2012 |
20120155467 | METHODS FOR CONFIGURING NETWORK SWITCHES - Network switches may be configured using flow tables. Flow table entries may contain header fields and associated actions. When a packet is received by a network switch, the network switch can compare fields in the packet to fields in the flow table entries and can take corresponding actions when matches are detected. A controller server can determine the topology of a network and can gather information on the capacities of network switches and other network switch capabilities. Based on this information and network configuration rules, the controller server can generate flow tables for the network switches that direct the switches to forward packets along desired paths through the network. The flow table entries for switches that are nearer the network core can be provided with more wildcarding than switches nearer the network edge. Traffic can be forwarded through encapsulation and deencapsulation engines to allow tunneling between isolated network domains. | 06-21-2012 |
20120281698 | SYSTEMS AND METHODS FOR MANAGING VIRTUAL SWITCHES - Network switches that are controlled by a controller server may contain ports through which network packets are received and forwarded. An architect may configure the controller server to create virtual switches. Each virtual switch may be formed from a subset of the ports of the network switches. The architect may assign administrators to the virtual switches. The administrators may configure the virtual switches. An administrator may use a command line interface to configure a virtual switch. The administrator may use commands such as a show port command, an access list command, a show access list command, and a membership rule command to manage the virtual switch. The controller server may prevent the administrator from logging on to virtual switches that have been assigned to other administrators. | 11-08-2012 |
20130070762 | SYSTEM AND METHODS FOR CONTROLLING NETWORK TRAFFIC THROUGH VIRTUAL SWITCHES - A network may include network switches with network switch ports that may be coupled to end hosts. The network switches may be controlled by a controller such as a controller server. Virtual switches may be formed using the controller from groups of the network switch ports and the end hosts. Each virtual switch may include virtual interfaces associated with end hosts or network switches. Virtual links may be formed that define network connections between the virtual interfaces and end hosts or between two virtual interfaces. Virtual network policies such as selective packet forwarding, packet dropping, packet redirection, packet modification, or packet logging may be implemented at selected virtual interfaces to control traffic through the communications network. The controller may translate the virtual network policies into network switch forwarding paths that satisfy the virtual network policies. | 03-21-2013 |
20130121486 | IDENTITY-BASED-ENCRYPTION MESSAGE MANAGEMENT SYSTEM - Systems and methods for managing email are provided. Some of the email may be encrypted using identity-based-encryption (IBE) techniques. When an incoming IBE-encrypted message for a recipient in an organization is received by a gateway at the organization, the gateway may request an IBE private key from an IBE private key generator. The IBE private key generator may generate the requested IBE private key for the gateway. The gateway may use an IBE decryption engine to decrypt the incoming message. The decrypted message can be scanned for viruses and spam and delivered to the recipient. Outgoing email messages can also be processed. If indicated by message attributes or information provided by a message sender, an outgoing message can be encrypted using an IBE encryption engine and the IBE public key of a desired recipient. | 05-16-2013 |
Patent application number | Description | Published |
20090179193 | CARBON NANOTUBE BASED INTEGRATED SEMICONDUCTOR CIRCUIT - Gate electrodes are formed on a semiconducting carbon nanotube, followed by deposition and patterning of a hole-inducing material layer and an electron inducing material layer on the carbon nanotube according to the pattern of a one dimensional circuit layout. Electrical isolation may be provided by cutting a portion of the carbon nanotube, forming a reverse biased junction of a hole-induced region and an electron-induced region of the carbon nanotube, or electrically biasing a region through a dielectric layer between two device regions of the carbon nanotube. The carbon nanotubes may be arranged such that hole-inducing material layer and electron-inducing material layer may be assigned to each carbon nanotube to form periodic structures such as a static random access memory (SRAM) array. | 07-16-2009 |
20100295025 | CARBON NANOTUBE BASED INTEGRATED SEMICONDUCTOR CIRCUIT - Gate electrodes are formed on a semiconducting carbon nanotube, followed by deposition and patterning of a hole-inducing material layer and an electron inducing material layer on the carbon nanotube according to the pattern of a one dimensional circuit layout. Electrical isolation may be provided by cutting a portion of the carbon nanotube, forming a reverse biased junction of a hole-induced region and an electron-induced region of the carbon nanotube, or electrically biasing a region through a dielectric layer between two device regions of the carbon nanotube. The carbon nanotubes may be arranged such that hole-inducing material layer and electron-inducing material layer may be assigned to each carbon nanotube to form periodic structures such as a static random access memory (SRAM) array. | 11-25-2010 |
20110263101 | CARBON NANOTUBE BASED INTEGRATED SEMICONDUCTOR CIRCUIT - Gate electrodes are formed on a semiconducting carbon nanotube, followed by deposition and patterning of a hole-inducing material layer and an electron inducing material layer on the carbon nanotube according to the pattern of a one dimensional circuit layout. Electrical isolation may be provided by cutting a portion of the carbon nanotube, forming a reverse biased junction of a hole-induced region and an electron-induced region of the carbon nanotube, or electrically biasing a region through a dielectric layer between two device regions of the carbon nanotube. The carbon nanotubes may be arranged such that hole-inducing material layer and electron-inducing material layer may be assigned to each carbon nanotube to form periodic structures such as a static random access memory (SRAM) array. | 10-27-2011 |
20120314476 | ORGANIC FERROELECTRIC MATERIAL BASED RANDOM ACCESS MEMORY - Illustrative embodiments provide a FETRAM that is significantly improved over the operation of conventional FeRAM technology. In accordance with at least one disclosed embodiment, a CMOS-processing compatible memory cell (see definition above) provides an architecture enabling a non-destructive read out operation using organic ferroelectric PVDF-TrFE as the memory storage unit and silicon nanowire as the memory read out unit. | 12-13-2012 |
20140127870 | SEMICONDUCTOR NANOSTRUCTURES, SEMICONDUCTOR DEVICES, AND METHODS OF MAKING SAME - A semiconductor structure is provided, which includes multiple sections arranged along a longitudinal axis. Preferably, the semiconductor structure comprises a middle section and two terminal sections located at opposite ends of the middle section. A semiconductor core having a first dopant concentration preferably extends along the longitudinal axis through the middle section and the two terminal sections. A semiconductor shell having a second, higher dopant concentration preferably encircles a portion of the semiconductor core at the two terminal sections, but not at the middle section, of the semiconductor structure. It is particularly preferred that the semiconductor structure is a nanostructure having a cross-sectional dimension of not more than 100 nm. | 05-08-2014 |
20140127888 | SEMICONDUCTOR NANOSTRUCTURES, SEMICONDUCTOR DEVICES, AND METHODS OF MAKING SAME - A semiconductor structure is provided, which includes multiple sections arranged along a longitudinal axis. Preferably, the semiconductor structure comprises a middle section and two terminal sections located at opposite ends of the middle section. A semiconductor core having a first dopant concentration preferably extends along the longitudinal axis through the middle section and the two terminal sections. A semiconductor shell having a second, higher dopant concentration preferably encircles a portion of the semiconductor core at the two terminal sections, but not at the middle section, of the semiconductor structure. It is particularly preferred that the semiconductor structure is a nanostructure having a cross-sectional dimension of not more than 100 nm. | 05-08-2014 |
20140292381 | GRAPHENE-BASED FREQUENCY TRIPLER - A frequency tripler device is disclosed. The frequency tripler device includes a first graphene based field effect transistor (FET) of a first dopant type, having a gate, a drain, and a source, and a second graphene based FET of a second dopant type, having a gate, a drain, and a source, the gate of the first FET coupled to the gate of the second FET and coupled to an input signal having an alternating current (AC) signal of a first frequency, the combination of the first and second FETs generates an output signal with a dominant AC signal of a frequency of about three times the first frequency. | 10-02-2014 |
Patent application number | Description | Published |
20090032803 | METHOD AND APPARATUS FOR FABRICATING A CARBON NANOTUBE TRANSISTOR - A method of fabricating a nanotube field-effect transistor having unipolar characteristics and a small inverse sub-threshold slope includes forming a local gate electrode beneath the nanotube between drain and source electrodes of the transistor and doping portions of the nanotube. In a further embodiment, the method includes forming at least one trench in the gate dielectric (e.g., a back gate dielectric) and back gate adjacent to the local gate electrode. Another aspect of the invention is a nanotube field-effect transistor fabricated using such a method. | 02-05-2009 |
20090309092 | SELF-ALIGNED NANOTUBE FIELD EFFECT TRANSISTOR AND METHOD OF FABRICATING SAME - A self-aligned carbon-nanotube field effect transistor semiconductor device comprises a carbon-nanotube deposited on a substrate, a source and a drain formed at a first end and a second end of the carbon-nanotube, respectively, and a gate formed substantially over a portion of the carbon-nanotube, separated from the carbon-nanotube by a dielectric film. | 12-17-2009 |
20100001260 | SELF-ALIGNED NANOTUBE FIELD EFFECT TRANSISTOR AND METHOD OF FABRICATING SAME - A self-aligned carbon-nanotube field effect transistor semiconductor device comprises a carbon-nanotube deposited on a substrate, a source and a drain formed at a first end and a second end of the carbon-nanotube, respectively, and a gate formed substantially over a portion of the carbon-nanotube, separated from the carbon-nanotube by a dielectric film. | 01-07-2010 |
20100173462 | METHOD AND APPARATUS FOR FABRICATING A CARBON NANOTUBE TRANSISTOR - A method of fabricating a nanotube field-effect transistor having unipolar characteristics and a small inverse sub-threshold slope includes forming a local gate electrode beneath the nanotube between drain and source electrodes of the transistor and doping portions of the nanotube. In a further embodiment, the method includes forming at least one trench in the gate dielectric (e.g., a back gate dielectric) and back gate adjacent to the local gate electrode. Another aspect of the invention is a nanotube field-effect transistor fabricated using such a method. | 07-08-2010 |
20110156133 | SEMICONDUCTOR NANOSTRUCTURES, SEMICONDUCTOR DEVICES, AND METHODS OF MAKING SAME - A semiconductor structure is provided, which includes multiple sections arranged along a longitudinal axis. Preferably, the semiconductor structure comprises a middle section and two terminal sections located at opposite ends of the middle section. A semiconductor core having a first dopant concentration preferably extends along the longitudinal axis through the middle section and the two terminal sections. A semiconductor shell having a second, higher dopant concentration preferably encircles a portion of the semiconductor core at the two terminal sections, but not at the middle section, of the semiconductor structure. It is particularly preferred that the semiconductor structure is a nanostructure having a cross-sectional dimension of not more than 100 nm. | 06-30-2011 |
20110201163 | SEMICONDUCTOR NANOSTRUCTURES, SEMICONDUCTOR DEVICES, AND METHODS OF MAKING SAME - A semiconductor structure is provided, which includes multiple sections arranged along a longitudinal axis. Preferably, the semiconductor structure comprises a middle section and two terminal sections located at opposite ends of the middle section. A semiconductor core having a first dopant concentration preferably extends along the longitudinal axis through the middle section and the two terminal sections. A semiconductor shell having a second, higher dopant concentration preferably encircles a portion of the semiconductor core at the two terminal sections, but not at the middle section, of the semiconductor structure. It is particularly preferred that the semiconductor structure is a nanostructure having a cross-sectional dimension of not more than 100 nm. | 08-18-2011 |
20120142158 | Self-Aligned Nanotube Field Effect Transistor and Method of Fabricating Same - A self-aligned carbon-nanotube field effect transistor semiconductor device comprises a carbon-nanotube deposited on a substrate, a source and a drain formed at a first end and a second end of the carbon-nanotube, respectively, and a gate formed substantially over a portion of the carbon-nanotube, separated from the carbon-nanotube by a dielectric film. | 06-07-2012 |
Patent application number | Description | Published |
20090094712 | Methods and Compositions For Increasing the Nitrogen Storage Capacity of a Plant - The present invention provides methods and compositions for making and using transgenic plants that exhibit increased nitrogen storage capacity compared to wild-type plants. Methods of the invention comprise inducing overexpression of monocot-derived vegetative storage proteins (VSPs) in plants, particularly in monocots. In some embodiments, at least one nucleotide construct comprising a nucleotide sequence encoding the ZmLox6 protein or a biologically active fragment or variant thereof is introduced into a plant. Depending upon the objective, the nucleotide construct may optionally comprise an operably linked coding sequence for a vacuolar sorting signal or plastid transit peptide in order to direct storage of the ZmLox6 protein or biologically active fragment or variant thereof into the vacuolar compartment or plastid compartment, respectively, of the cells in which the VSP is expressed. The invention further provides methods for producing plants with increased nitrogen content and/or increased nutritional value, which is desirable in commercial crops, including those used for forage, silage, and grain production. | 04-09-2009 |
20090293147 | Methods For Improving Plant Growth - The present invention provides methods and compositions for making and using transgenic plants that exhibit increased nitrogen storage capacity compared to wild-type plants. Methods of the invention comprise inducing overexpression of monocot-derived vegetative storage proteins (VSPs) in plants, particularly in monocots. In some embodiments, at least one nucleotide construct comprising a nucleotide sequence encoding the ZmLox6 protein or a biologically active fragment or variant thereof is introduced into a plant. Depending upon the objective, the nucleotide construct may optionally comprise an operably linked coding sequence for a vacuolar sorting signal or plastid transit peptide in order to direct storage of the ZmLox6 protein or biologically active fragment or variant thereof into the vacuolar compartment or plastid compartment, respectively, of the cells in which the VSP is expressed. The invention further provides methods for producing plants with increased nitrogen content and/or increased nutritional value, which is desirable in commercial crops, including those used for forage, silage, and grain production. | 11-26-2009 |
20100100985 | Methods and Compositions for Increasing the Nitrogen Storage Capacity of a Plant - The present invention provides methods and compositions for making and using transgenic plants that exhibit increased nitrogen storage capacity compared to wild-type plants. Methods of the invention comprise inducing overexpression of monocot-derived vegetative storage proteins (VSPs) in plants, particularly in monocots. In some embodiments, at least one nucleotide construct comprising a nucleotide sequence encoding the ZmLox6 protein or a biologically active fragment or variant thereof is introduced into a plant. Depending upon the objective, the nucleotide construct may optionally comprise an operably linked coding sequence for a vacuolar sorting signal or plastid transit peptide in order to direct storage of the ZmLox6 protein or biologically active fragment or variant thereof into the vacuolar compartment or plastid compartment, respectively, of the cells in which the VSP is expressed. The invention further provides methods for producing plants with increased nitrogen content and/or increased nutritional value, which is desirable in commercial crops, including those used for forage, silage and grain production. | 04-22-2010 |
20110004960 | Methods and Compositions for Increasing the Nitrogen Storage Capacity of a Plant - The present invention provides methods and compositions for making and using transgenic plants that exhibit increased nitrogen storage capacity compared to wild-type plants. Methods of the invention comprise inducing overexpression of monocot-derived vegetative storage proteins (VSPs) in plants, particularly in monocots. In some embodiments, at least one nucleotide construct comprising a nucleotide sequence encoding the ZmLox6 protein or a biologically active fragment or variant thereof is introduced into a plant. Depending upon the objective, the nucleotide construct may optionally comprise an operably linked coding sequence for a vacuolar sorting signal or plastid transit peptide in order to direct storage of the ZmLox6 protein or biologically active fragment or variant thereof into the vacuolar compartment or plastid compartment, respectively, of the cells in which the VSP is expressed. The invention further provides methods for producing plants with increased nitrogen content and/or increased nutritional value, which is desirable in commercial crops, including those used for forage, silage, and grain production. | 01-06-2011 |