摘要:
A method and system for generating and printing an indicium, such as a postal indicium, on an object such as a mail piece. A digital image of other printed material, such as an address block, on the object is obtained, and the image is processed to abstract characterizing information descriptive aspects of the other printed material. The aspects can be measurements of word lengths, counts of outliers in images of characters, or descriptions of the shape of the other printed material. The characterizing information is combined with other information, such as postal information, and the combined information is then cryptographically authenticated with a digital signature or the like. An indicium representative of the authenticated information is then printed on the object. The object's relationship to the indicium can be verified by regenerating the characterizing information from the other printed material and comparing the regenerated characterizing information with characterizing information recovered from the indicium. Thus, copies of the indicium cannot easily be used, without detection, on other objects which do not include the other printed material.
摘要:
A method and system for generating and printing an indicium, such as a postal indicium, on an object such as a mail piece. Other printed material, such as an address block, on the object is scanned, and the scanned image is processed to abstract characterizing information descriptive of the other printed material. Alternatively, the image to be processed can be obtained by filtering the original image wit a print/scan filter which simulates printing and scanning processes. The characterizing information can be text-based or image-based. Image-based characterizing information can be measurements of word lengths, counts of outliers in images of characters, or descriptions of the shape of the other printed material. The characterizing information is combined with other information, such as postal information and the combined information is then cryptographically authenticated with a digital signature or the like. An indicium representative of the authenticated information is then printed on the object. The object's relationship to the indicium can be verified by regenerating the characterizing information from the other printed material and comparing the regenerated characterizing information with characterizing information recovered from the indicium. Thus, copies of the indicium cannot easily be used, without detection, on other objects which do not include the other printed material
摘要:
A method and system for characterizing blocks of printed material. A digital image of printed material, such as an address block, on an object is obtained, and the image is processed to abstract characterizing information descriptive aspects of the other printed material. The characterizing information is combined with other information, such as postal information and the combined information is then cryptographically authenticated with a digital signature or the like. An indicium representative of the authenticated information is then printed on the object. The object's relationship to the indicium can be verified by regenerating the characterizing information from the other printed material and comparing the regenerated characterizing information with characterizing information recovered from the indicium. Thus, copies of the indicium cannot easily be used, without detection, on other objects which do not include the other printed material. A combination of algorithms is selected from a predetermined group of characterizing algorithms by determining an estimate for the robustness of each algorithm and selecting a combination having high overall robustness.
摘要:
A method and system for selecting a characterizing algorithm to be used to characterize blocks of printed material. A digital image of printed material, such as an address block, on an object is obtained, and the image is processed to abstract characterizing information descriptive aspects of the other printed material. The characterizing information is combined with other information, such as postal information, and the combined information is then cryptographically authenticated with a digital signature or the like. An indicium representative of the authenticated information is then printed on the object. The object's relationship to the indicium can be verified by regenerating the characterizing information from the other printed material and comparing the regenerated characterizing information with characterizing information recovered from the indicium. Thus copies of the indicium cannot easily be used, without detection, on other objects which do not include the other printed material. A particular algorithm is selected from a predetermined group of characterizing algorithms by determining an estimate for the robustness of each algorithm with respect to small changes in the image caused by the printing and scanning process or by defacing of the printed address by blots or the like.
摘要:
Methods, systems, and computer programs for managing mobile device applications are described. In some aspects, a mobile device application is prevented from accessing resources of a wireless network. For example, a wireless network operator system can determine that one or more mobile device applications are disapproved for use in the wireless network. In some implementations, the wireless network operator denies the disapproved mobile device applications access to the wireless network resources. In some implementations, mobile devices disable access to the wireless network by the disapproved mobile device applications.
摘要:
A voting method includes receiving identity-based information, vote data and a passphrase for a voter, encrypting the vote data using a symmetric key, generating second identity-based information for the voter, and generating an identity-based public key using at least the second identity-based information and a voting system parameter. The symmetric key is encrypted using the identity-based public key and an identity-based asymmetric encryption algorithm. The encrypted symmetric key may be decrypted using a private key corresponding to the identity-based public key and an identity-based asymmetric decryption algorithm, wherein the private key is generated from at least the identity-based public key and a secret master key. The voter is provided with information that includes at least the encrypted vote data and the encrypted symmetric key, and the system retains anonymous identity information, encrypted vote data and the encrypted symmetric key as a paper audit trail.
摘要:
Methods, systems, and computer programs for managing mobile device applications are described. In some aspects, a mobile device application is prevented from accessing resources of a wireless network. For example, a wireless network operator system can determine that one or more mobile device applications are disapproved for use in the wireless network. In some implementations, the wireless network operator denies the disapproved mobile device applications access to the wireless network resources. In some implementations, mobile devices disable access to the wireless network by the disapproved mobile device applications.
摘要:
A method, and deterministic random bit generator system operating in accordance with the method, for generating cryptographic keys and similar secret cryptographic inputs which are hard to guess. A seed is input from an entropy source; and an initial state is generated as a function of the seed. When a request to generate a cryptographic key is received a current state, where the current state is initially the initial state, is mixed to generate an out put string and a next state and the current state is set to the next state. The requested cryptographic key is generated from the string; and output. These steps can be repeated to generate successive output strings with assurance of forward and backward secrecy. An encryption system including such a generator is also disclosed.
摘要:
Methods, systems, and computer programs for managing mobile device applications are described. In some aspects, a mobile device application is prevented from accessing resources of a wireless network. For example, a wireless network operator system can determine that one or more mobile device applications are disapproved for use in the wireless network. In some implementations, the wireless network operator denies the disapproved mobile device applications access to the wireless network resources. In some implementations, mobile devices disable access to the wireless network by the disapproved mobile device applications.
摘要:
Methods, systems, and computer programs for managing mobile device applications are described. In some aspects, a mobile device application is prevented from accessing resources of a wireless network. For example, a wireless network operator system can determine that one or more mobile device applications are disapproved for use in the wireless network. In some implementations, the wireless network operator denies the disapproved mobile device applications access to the wireless network resources. In some implementations, mobile devices disable access to the wireless network by the disapproved mobile device applications.