![REFERENCES
[1] (2011, Jul. 7) Openssl [Online]. Available:
http://www.openssl.org/
[2] M. Bellare and S. Micali, “Non-interactive oblivious transfer and
applications,” in Proc. CRYPTO, 1990, pp. 547–557.
[3] A. Beresford and F. Stajano, “Location privacy in pervasive
computing,”IEEE Pervasive Comput., vol. 2, no. 1, pp. 46–55, Jan.–
Mar.2003.](https://image.slidesharecdn.com/final-150902101608-lva1-app6891/85/Analysis-the-Privacy-preserving-and-content-protecting-location-based-on-queries-22-320.jpg)
Analysis the Privacy preserving and content protecting location based on queries
- 1. ANALYSIS THE SECURE CONTENT PROTECTING LOCATION BASED ON QUERIES Guided by Ms v.Anusuya M.E AP/IT Presented by PR.Kavidha(912411205006) C.Vasanthi(912411205010)
- 2. ABSTRACT • A solution to one of the location-based query problems. user wants to query a database of location data, known as Points Of Interest. • The first step is based on Oblivious Transfer. The second step is based on Private Information Retrieval, to achieve a secure solution for both parties. • The solution we present is efficiency of our protocol. We also introduce a security model and analyse the security in the context of novel protocol.
- 3. EXISTING SYSTEM • The location server (LS),which offers somes LBS spends its resources to compile information about various interestingPOI. • LS’sdata is not accessed by any unauthorized user. Disadvantage: • Not protected for the user and server. • privacy assurance is the major issue
- 4. MODEL OF EXISTING SYSTEM
- 5. PROPOSED SYSTEM • Location based queries that as major performance improvement two stages. • First stage the user privately determines his/her location within a public grid,using oblivioues transfer. • Second stage ,the user execute a communicational efficient PIR,to retrieve the appropriate block in the private grid.
- 6. ADVANTAGES • Redesigned the key structure • Added a formal security model • Implemented the solution of mobile device and desktop machine
- 8. OBLIVIOUS TRANSFER PHASE • QueryGeneration1 (Client) (QG1): QueryGeneration1 (Client) takes as input indices i, j, and the dimensions of the key matrix m, n, and outputs a query Q1 and secret s1, denoted as (Q1, s1) = QG1 (i, j, m, n). • ResponseGeneration1 (Server) (RG1): ResponseGeneration1 (Server) takes as input the key matrix Km×n, and the query Q1, and outputs a response R1, denoted as (R1) = RG1(Km×n,Q1). • ResponseRetrieval1 (Client) (RR1): ResponseRetrieval1 (Client) takes as input indices i, j, denoted as (ki,j, IDi,j) = RR1 (i, j, m, n, (Q1, s1),R1).
- 9. PRIVATE INFORMATION RETRIEVAL PHASE • QueryGeneration2 (Client) (QG2): QueryGeneration2 (Server) takes as input the cell-id IDi,j , and the set of prime powers S, and outputs a query Q2 and secret s2, denoted as (Q2, s2) = QG2(IDi,j , S). • ResponseGeneration2 (Server) (RG2): ResponseGeneration2 (Server) takes as input the database D. • ResponseRetrieval2 (Client) (RR2): ResponseRetrieval2(Client) takes as input the cell-key ki,j and cell-id IDi,j , the query Q2 and secret s2, the response R2, and outputs the data d, denoted as (d) =RR2(ki,j, IDi,j , (Q2, s2),R2).
- 10. MODULES 1. Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure 2. Expedite Message Authentication Protocol 3. Security Analysis a) Hash Chain Values b) Resistance of forging attacks c) Forward secrecy d) Resistance to replay attacks e) Resistance to colluding attacks
- 11. MODULES DESCRIPTION 1. Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure • In this Module, the two basic communication modes, which respectively allow OBUs to communicate with each other and with the infrastructure RSUs. • Since vehicles communicate through wireless channels, a variety of attacks such as injecting false information, modifying and replaying the disseminated messages can be easily launched.
- 12. 2.Expedite Message Authentication Protocol • A Trusted Authority (TA): Providing anonymous certificate and Distributing secret keys to all OBUs in the network. • Roadside units (RSUs): which are fixed units distributed all over the network. The RSUsCan communicate securely with the TA. • On-Board Units (OBUs): which are embedded in vehicles? OBUs can communicate either with other OBUs through V2V communications or with RSUs through V2I communications.
- 13. 3.Security Analysis – Hash Chain Values • The values of the hash chains are continuously used in the revocation processes, and hence, the TA can consume all the hash chain values. – Resistance of forging attacks • Find the TA secret key and signature. To the revocation check and TA message and signature are unforgetable.
- 19. RESPONSE SEND TO MIS
- 21. CONCLUSION • A location based query solution that employs two protocols that enables a user to privately determine and acquire location data.
- 22. REFERENCES [1] (2011, Jul. 7) Openssl [Online]. Available: http://www.openssl.org/ [2] M. Bellare and S. Micali, “Non-interactive oblivious transfer and applications,” in Proc. CRYPTO, 1990, pp. 547–557. [3] A. Beresford and F. Stajano, “Location privacy in pervasive computing,”IEEE Pervasive Comput., vol. 2, no. 1, pp. 46–55, Jan.– Mar.2003.