Ntt Research, Inc.

Hoeteck Wee

Daniel Wichs

A broadcast network can use a pairing-based broadcast encryption scheme for N users with O(N)-sized parameters. A pairing-based ciphertext-policy attribute-based encryption (CP-ABE) scheme for the class of degree 3 polynomials can be implemented with compact parameters. The public key, ciphertext and secret keys comprise O(n) group elements, where n is input length for the function. The constructions achieve adaptive security against unbounded collusions, and rely on the (bilateral) k-Lin assumption in prime-order bilinear groups.

Broadcast encryption with improved resource utilization

The invention relates to systems, methods, network devices, and machine-readable media for improved constructions of public-key functional encryption schemes for quadratic functions. In particular, the present disclosure relates to a new functional encryption scheme to compute quadratic functions so that the data owner controls what can be computed but is not involved in the calculation, and generates a decryption key which allows one to learn a quadratic function evaluation of some encrypted data.

Functional encryption for quadratic functions

The invention relates to systems, methods, network devices, and machine-readable media for creating obfuscated computer-executable instructions to enhance security. The invention can receive a set of non-obfuscated executable instructions corresponding to a program, and using a functional encoding primitive comprising an encoding process, an opening process, and a decoding process, generate a set of obfuscated instructions which can then be provided to a relatively insecure environment.

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San Francisco, CA, United States of America

Hoeteck Wee