Pitney Bowes Inc.

Yassir Nawaz

Robert A Cordery

Frederick W Ryan, Jr

Bertrand Haas

Andrei Obrea

Bradley R Hammell

Femi Olumofin

Ahmet Emir Dirik

Jun Zhang

Christian A Geske

Frederick W Ryan

A system and method that allows two parties to find common records in their data sets without having to actually share the data sets with each other or a third party. Two primitives, perfect hash functions and public key cryptography, are combined in a unique way to obtain a secure and efficient private matching solution. Since the data that is exchanged is always encrypted during the match process, neither party reveals its data to the other party. This solution enables two parties to match sensitive data such as PII (Personally Identifiable Information) or PHI (Protected Health Information) without having to disclose the data to other or to any third party. One or both of the parties only learn of matching records without learning any information about the records that do not match.

System and method for matching data sets while maintaining privacy of each data set

Methods and systems that allow a user to receive location-based services for user selected businesses while maintaining the privacy of his/her location when not in the vicinity of a user selected business. A user designates selected businesses to the LBS provider. The user's mobile device sends its location, in encrypted form, to the LBS provider. The LBS provider performs a computation on the encrypted location and returns an encrypted result to the user's mobile device. The user's mobile device decrypts the result and determines whether the user is near any selected businesses based on the decrypted result. Only if the decrypted result indicates the user is near an approved location will the users mobile device return its location, in an unencrypted form, to the LBS provider. Thus, the LBS provider will only know the user's location if and only if the use is near a business selected by the user.

Location-based service provider method and system having a user controlled location privacy mechanism

Methods and systems for a user to receive location-based services for user selected locations while maintaining the privacy of his/her location unless in the vicinity of a user selected location. A user designates selected locations to the LBS provider. The LBS provider digitally signs grid cell identifiers of approved locations and the signatures are stored in the user's mobile device. The mobile device determines the grid cell identifier of its current location, blinds the grid cell identifier, and sends the blinded grid cell identifier to the LBS provider. The LBS provider digitally signs the blinded grid cell identifier, and returns the signature to the mobile device. The mobile device removes the blinding from the blinded signature to obtain the digital signature for the grid cell identifier. The user's mobile device then compares the signature of the grid cell identifier with those stored in its memory to determine whether the user is near any approved locations.

An image encryption method that includes receiving image data based on an image, wherein the image data comprises a plurality of pixel values, and permuting a plurality of, and preferably all of, the pixel values using at least a secret key to create permuted image data. Also, an image decryption method that includes scanning a printed image to create scanned image data. The printed image is generated from permuted image data that is generated by permuting a plurality of first pixel values of first image data using at least a secret key, obtaining a plurality of second pixel values from the scanned image data, and reverse-permuting a plurality of the second pixel values using at least the secret key to create reverse-permuted scanned image data.

Image encryption for print-and-scan channels using pixel position permutation

A method and system for securing the communication link between the accounting device and printer of a metering system by authenticating the data being sent via the link utilizing a Nonlinear Feedback Shift Register (NLFSR) based system is provided. A NLFSR is provided in each of the accounting unit and printing unit of a metering system. The NLFSR in the accounting unit is utilized to generate a message authentication code (MAC) for the image data being sent from the accounting unit to the printing unit. The printing unit generates a corresponding MAC for the received image data using the NLFSR in the printing unit. The MAC generated by the printing unit is compared with the MAC generated by the accounting unit. If the MACs are similar, the image data is accepted as authentic and the printing unit will print the image corresponding to the image data.

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Hamden, CT, United States of America

Yassir Nawaz