67 results about "Time signature" patented technology

A measuring device is provided with a signal generator and a signal receiver, which is located at a measurable distance from the signal generator. The signal generator is designed for the emission of at least two signal beams covering in given relationship to each other an area and the signal receiver is designed for the time-resolved reception of the signal beams in such a manner that the generator-receiver distance can be determined from the time signature of the signal beam reception.

A method, computer program product, system and apparatus are presented for reducing wasted bandwidth due to supercasting multicast cells through a router switch fabric. In one embodiment of the present invention, signatures of a switch fabric destination address are generated and compared. A signature is an information-rich representation of the fabric destination address that is generated using the fabric destination address. Therefore, supercasting can be minimized by combining fabric destination addresses with like signatures. Aspects of the present invention include generating the signatures using random permutation maps of the set of switch fabric ports or determining intersections of a fabric destination address with a selection of subsets of the switch fabric ports. Signature-based solutions for supercast minimization can be performed in a time-efficient manner and be implemented online, while solutions that can generate a more optimal solution but may take a longer time to perform, such as row-clustering, can be implemented off-line. A further aspect of the invention, incorporates an off-line row-clustering supercast minimization method with an on-line signature-based supercast minimization method.

A signature system in which size of data to be transmitted is small and data can be processed efficiently in a Merkle signature system having high security. A processing part 112 of a smartcard 110 divides a message to be signed into groups of specific numbers of bits, starting from the first bit of the message. Then, respective partial one-time signatures of the groups are generated by encrypting each group by a one-way function processing part 112c. The partial one-time signatures are sequentially outputted to a verification apparatus through a interface part 113.

A system and method for a vehicle-to-vehicle communications system that provide active safety applications employing lightweight geographic authentication using one-time signatures. The system and method require each vehicle to construct a discretized representation of its trajectory, which captures its kinematical history to a tunable degree of accuracy and to a tunable extent in the past. This trajectory information is then signed using a one-time signature. Thus, with every periodic message, the sending vehicle transmits the usual application payload, a signed version of the trajectory as described, and the digital signature over all of the fields.

A system is described that permits identified musical phrases or themes to be synchronized and linked into changing real-world events. The achieved synchronization includes a seamless musical transition—achieved using a timing offset, such as relative advancement of an significant musical “onset”, that is inserted to align with a pre-existing but identified music signature, beat or timebase—between potentially disparate pre-identified musical phrases having different emotive themes defined by their respective time signatures, intensities, keys, musical rhythms and/or musical phrasing. The system operates to augment an overall sensory experience of a user in the real world by dynamically changing, re-ordering or repeating and then playing audio themes within the context of what is occurring in the surrounding physical environment, e.g. during different phases of a cardio workout in a step class the music rate and intensity increase during sprint periods and decrease during recovery periods.

A method is provided of authenticating a digitally signed message. A chain of messages is generated. A Winternitz pair of keys is generated for each respective message. A sequence number is assigned to each of the messages. Each of the sequence numbers cooperatively identify an order of Winternitz verifiers assigned to each of the messages. A signature to a first message in the chain of messages is signed using a digital signature algorithm private key. Signatures to each of the following messages in the chain of messages are signed using both Winternitz private keys and digital signature algorithm private keys. The signed messages are broadcast from a sender to a receiver. The first signed broadcast message is authenticated at the receiver by verifying the digital signature algorithm signature. At least some of the following signed broadcast messages are authenticated at the receiver by verifying only the Winternitz signature.

The invention discloses a symbian signature application authentication method and system. The method comprises a first step of performing authentication signature on application programs and obtaining an authenticated signature installation package; a second step of generating a self-signature installation package according to the signature installation package and channel numbers, issuing the self-signature installation package, and enabling the self-signature installation package to comprise the signature installation package and the channel numbers; and a third step of saving the channel numbers locally in installation, downloading and installing the self-signature installation package, running the application programs in the signature installation package, enabling the application programs to read the channel numbers, and finishing installation. Packaging work of various channels can be finished by one-time signature, time accuracy of the signature is guaranteed, and the cost is reduced.

Among other things, techniques and systems are disclosed for detecting musical structures, such as downbeats. In one aspect, a method performed by a data processing device includes receiving an input audio signal. The method includes detecting a meter in the received audio signal. Detecting the meter includes generating an envelope of the received audio signal; generating an autocorrelation phase matrix having a two-dimensional array based on the generated envelope to identify a dominant periodicity in the received audio signal; and filtering both dimensions of the generated autocorrelation phase matrix to enhance peaks in the two-dimensional array. The meter represents a time signature of the input audio signal having multiple beats. Additionally, the method includes identifying a downbeat as a first beat in the detected meter.

One embodiment of the present invention provides a system that facilitates detecting and correcting errors. The system operates by receiving a data packet comprised of p words on a communication pathway, wherein each bit of a word is received on a separate data line in a set of data lines that comprise the communication pathway. The system also receives a time signature t on the communication pathway, wherein t contains per-bit error information for the p words in the data packet. As the data packet is received, the system performs an error-detection operation on each data bit of the data packet in parallel, wherein the error-detection operation generates per-bit error information for each bit position across the p words in the data packet. Finally, the system compares the generated per-bit error-information with the corresponding per-bit error information in the time signature t to determine if there exists an error.

The invention relates to a wireless router and mobile phone based attendance signature method. The wireless router and mobile phone based attendance signature method comprises the following steps that a wireless router conforming to attendance signature conditions is selected; related values of the wireless router, an address of an attendance signature place, limiting conditions of verifying a signature person, a zero coordinate using the address of the attendance signature place as a fixed reference coordinate, the on-duty distance range of the person, commuter time and other values are preset attendance signature software built in a mobile phone; a signature behavior is determined by judging whether three groups of real-time connected data including wireless router parameters and preset parameters, a real-time address and a preset address and real-time signature person verification mode and preset limiting conditions for signature person verification are matched and consistent or not; the attendance situations, such as outgoing, on-duty and off-duty are determined by calculating the real-time distance of the person holding the mobile phone and acquiring, computing and comparing multiple states feeding back the mobile phone at intervals of preset time frequency. By adoption of the new attendance signature method, real-time checking and supervision are achieved.

The invention relates to a NOT operational character supported characteristic-based CP-ABE method having CCA security. An access control structure is an access control tree; a NOT node is added in the access control tree; and k is equal to -1. Meanwhile, according to regulation, a father node of the NOT node must be an ''AND'' node and only one intermediate node is hung under the NOT node; and thus the intermediate node is used as a root node to set a strategy tree and the strategy tree expresses a related strategy, set by an encryption party, of a NOT attribute. A high one-time signature technology is added to further enhance a security level of the method from a CPA security level to a CCA security level. Strategy expression based on an attribute encryption algorithm is enriched; security of the existing method is enhanced, thereby building the high access controlling capability; and moreover, the method has an encryption method with a provable security.

A multifunctional device and method for bispectral imaging are provided. The device and method include acquiring a plurality of bispectral images (IBM), each bispectral image being the combination of two acquired images (I_M1, 1_M2) in two different spectral bands, and generating a plurality of images, each of which gives an impression of depth by combining the two acquired images (I_M1, 1_M2) and forming imaging information. The method includes simultaneously processing the plurality of bispectral images in order to generate, in addition to the imaging information, watch information and/or early threat information, comprising the following steps: searching for specific spectrum and time signatures, associated with a particular threat, in the plurality of bispectral images; and detecting a specific object in each bispectral image, and generating a time-tracking of the position of the object in the plurality of images in each spectral band, and the detecting and the tracking of the object forming the watch information.

A method for automatically matching video streams from two cameras of a camera network includes obtaining a video stream of frames that are acquired by each of the cameras. Each video stream includes images of moving objects. A time signature for each of the video streams is calculated. Each time signature is indicative of a time at which an image of one the objects is located at a predetermined part of the frame. A temporal offset of one of the signatures relative to the other signature is calculated such that, when applied to one of the signatures, a correspondence between the signatures is maximized. The temporal offset is applicable to video streams that are acquired by the two cameras to determine if a moving object that is imaged by one of the cameras is identical to a moving object that is imaged by the other camera.

Embodiments of the invention provide an encryption method, a decryption method and electronic equipment. The method comprises steps of acquiring a public key, a plaintext and a first bit string of a preset length through first electronic equipment, wherein the public key comprises the only defect trapdoor function; acquiring a key pair of a one-time signature scheme by the first electronic equipment, wherein the public pair comprises a verification secret key and a signature secret key corresponding to the verification secret key; acquiring a middle cryptograph set according to the only defect trapdoor function, the first bit string of the preset length, the plaintext and the verification secret key; signing the middle cryptograph set by the first electronic equipment according to the signature secret key, and acquiring a signature of the middle cryptograph set; and forming a final cryptograph by combing the verification secret key, the middle cryptograph set and the signature of the middle cryptograph set, and outputting the final cryptograph. Therefore, anti-selection cryptograph attack is achieved.

A system and method for determining the appropriate tempo for early music, which may have originally lacked metronome-based time values, and for playing musical instruments according to the same. One example of such early music is the various piano works of Johann Sebastian Bach. The appropriate tempo is determined according to a number of indicators or parameters within the music score including the common time mode, the time signature, the fastest note type, and the absence or presence of any tempo words. Tempos are based around a common time beat value of 71 beats per minute and a cut-time beat value of 80. Other beats are derived using the parameters based on either of these two base values. An electronic device and/or software application may be provided for determining the appropriate tempo according to the illustrative system and displaying it according to an audio and/or visual queue.

The invention provides a self-owned post quantum key distribution method comprising the following steps: key generation: keys are generated by using a hash tree, and the hash tree calculates the initial hash value H(Yi) of a public key Yj and then calculates the hash value H(Yi-1) of a previous node until the hash value H(Y1) of the last node is left; signature generation: a signer selects a key pair (Xi, Yi), carries out Merkle signature on the key pair (Xi, Yi) through a one-time signature scheme, and sends additional information to Merkle to prove that Merkle is indeed a signed key; and signature verification: after receiving the Merkle-signed key pair (Xi, Yi), a receiver uses a public key Yi to verify whether the key pair (Xi, Yi) is signed by a one-time verification scheme. Computation can be reduced while the security of data is guaranteed. Therefore, the efficiency is improved.

The invention discloses a blockchain non-mining labor cost signature transfer method. The method comprises the following steps: a client sends a transaction hash assembled by token transfer-out addresses, transfer-out number and collection address information to a server; the server receives the transaction hash and provides an address stored with a certain amount of dominant currency for paying the uplink packaged miner fee, and the server obtains the UTXO information, the UTXO address and the related change address from the block chain node and sends the UTXO information, the UTXO address and the related change address to the client; the client receives the UTXO information, the UTXO address and the related change address, and the user establishes an uplink transaction based on the signature of the client and confirms a first result; the server side carries out information integrity checking, the server side carries out second-time signature after checking is passed, and the client side confirms a second-time signature result and then broadcasts the second-time signature result to the block chain network; and each destination block chain node receives the broadcast and packages the broadcast, and after packaging confirmation is completed, account transfer succeeds. According to the invention, other addresses are used for replacing payment of the token transfer miner fee issued based on the main chain, and transfer for two times is not needed.