Indistinguishability Obfuscation And Its Applications

With the mature of cloud computing technology,the computer cloud services are diversified.Cloud services using the cloud computing power and storage capacity will provide a broad market for small and medium-sized enterprises and individuals.Service providers hope to protect property rights and internal information of service software,and users also want to ensure the confidentiality of personal information as much as possible,especially related to medical information and other important information that may be related to users' personal safety.And indistinguishability obfuscation technology as one of the hot research areas,plays a very important role in these two aspects.This article aimed at the characteristics of present cloud service system and indistinguishability obfuscation proposes a new type of cloud service outsourcing scheme based on indistinguishability obfuscation technology,at the same time puts forward a way to use indistinguishability obfuscation to distinguish the multi-party key agreement mechanism.Also,the security of the new schemes are analyzed and proved.In this paper,the main innovation points and contributions are:1.We propose a cloud service outsourcing scheme with controlled regulation based on indistinguishability obfuscation.Based on previous cloud service outsourcing scheme,we reduce the credibility of cloud service providers and joined the half-trusted key generation center to be a regulator.The key generation center and providers need to obfuscate programs and authenticate the identities of access users respectively.Then the generation of the session key that users encrypt messages need the KGC and providers to get cooperation,which ensures users' message will not be stolen by any other participants,also ensures the effective and controllable regulation.2.We put forward a new kind of key agreement mechanism from indistinguishability obfuscation.Using the indistinguishability obfuscation,We can make the key agreement process of a user to be a public key,then any other party will communicate with this user at any time safely.At the same time,there can be two or three party to be involved in without extra computing and communication cost.In the light of the characteristics of intelligent medical service system,we show how to solve the problem faced in intelligent medical service system.Finally,we prove the safety analysis of the scheme.