An inner-product functional encryption scheme in which the maximum length of a ciphertext and the maximum length of a secret key are not restricted can be constructed. An encryption device (20) generates a ciphertext ct.sub.x in which a vector x is encrypted, using encryption setting information that is of a size depending on the size of the vector x and is generated using as input public information of a fixed size. A key generation device (30) generates a secret key sk.sub.y in which a vector y is set, using key setting information that is of a size depending on the size of the vector y and is generated using as input the public information. A decryption device (40) decrypts the ciphertext ct.sub.x with the secret key sk.sub.y to calculate an inner-product value of the vector x and the vector y.

Method, device and computer program product for managing a plurality of encryption keys using a keystore seed that defines a seed bit set. A key management process defines a key mapping between the seed bit set and the plurality of encryption keys. The key management process enables each encryption key to be generated from the seed bit set using a corresponding keying material value and the key mapping. The key mapping specifies that an encryption key is generated by partitioning the seed bit set into a plurality of seed bit partitions, determining a keying value from the keying material value, determining a key sequence using the plurality of seed bit partitions and the keying value, and determining the encryption key from the key sequence. Management of a large number of encryption keys can be simplified through indirect management via the keystore seed and the key management process.

Devices, systems and methods for enhancing aircraft maintenance are disclosed. An exemplary method for improving dataloading in an airplane includes retrieving, from an in-flight entertainment connectivity (IFEC) system, at least one avionics software, the IFEC system comprising a mass storage device comprising a first storage segment and a second storage segment, the first storage segment being a secure storage segment configured to store the at least one avionics software, and the second storage segment being configured to store media content, and loading, using a wireless network converter coupled to a wired legacy port, the at least one avionics software onto a target avionics system.

Devices, systems and methods for enhancing aircraft maintenance are disclosed. An exemplary method for improving dataloading in an airplane includes retrieving, from an in-flight entertainment connectivity (IFEC) system, at least one avionics software, the IFEC system comprising a mass storage device comprising a first storage segment and a second storage segment, the first storage segment being a secure storage segment configured to store the at least one avionics software, and the second storage segment being configured to store media content, and loading, using a wireless network converter coupled to a wired legacy port, the at least one avionics software onto a target avionics system.

In an approach for detecting and processing multiple audio signals simultaneously, an audiometric receiver system comprises a transmitter, wherein the transmitter comprises a digital signal processor, and wherein the digital signal processor comprises a quality check component, an amplifier or attenuator component, mixer component, a modulator component, and an encrypter component; and a receiver, wherein the receiver comprises a decrypter component, a demodulator component, a splitter component, and a second amplifier or attenuator component.

In an approach for detecting and processing multiple audio signals simultaneously, an audiometric receiver system comprises a transmitter, wherein the transmitter comprises a digital signal processor, and wherein the digital signal processor comprises a quality check component, an amplifier or attenuator component, mixer component, a modulator component, and an encrypter component; and a receiver, wherein the receiver comprises a decrypter component, a demodulator component, a splitter component, and a second amplifier or attenuator component.

A system and method for collecting, processing, storing, or transmitting traffic data. A localized data collection module may retrieve, receive, or intercept traffic data through or from hardware installed in a traffic control cabinet adjacent an intersection or other roadway feature of interest. Data which may have previously been confined to a closed loop traffic control system may be remotely accessible for traffic operations control or monitoring via a network connected server and/or cloud architecture.

A system and method for collecting, processing, storing, or transmitting traffic data. A localized data collection module may retrieve, receive, or intercept traffic data through or from hardware installed in a traffic control cabinet adjacent an intersection or other roadway feature of interest. Data which may have previously been confined to a closed loop traffic control system may be remotely accessible for traffic operations control or monitoring via a network connected server and/or cloud architecture.

A bin syncing technique ensures continuous data protection, such as replication and erasure coding, for content driven distribution of data served by storage nodes of a cluster in the event of failure to one or more block services configured to process the data. The cluster maintains information about the block services assigned to host a bin with a copy of the data in a bin assignment table associated with a state. The copies of the data are named, e.g., replica 0 (R0), replica 1 (R1) or replica 2 (R2). In response to failure of one or more block services assigned to host a bin with a replica of the data, an alternate or replacement block service may access the assignments maintained in the bin assignment table, which specify names of the replicas associated with the state.

This application provide quantum key distribution methods, devices, and storage media. In an implementation, a method comprises: determining, based on a first mapping, a first quantum key of N first quantum keys corresponding to an i.sup.th node on a target routing path; determining, based on a second mapping, a second quantum key of N second quantum keys corresponding to the i.sup.th node; and generating, by the i.sup.th node based on the first quantum key corresponding to the i.sup.th node and the second quantum key corresponding to the i.sup.th node, a third quantum key corresponding to the i.sup.th node on the target routing path.