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Secure and Anonymous Communication Technique:

Formal Model and its Prototype Implementation

ABSTRACT

Anonymous communication channels should have certain authentication mechanisms because such channel could incubate criminal communication. To cope with this issue, we propose a secure and anonymous communication protocol by employing identity-based encryption for encrypting packets without sacrificing anonymity, and group signature for anonymous user authentication. Communication occurs in the protocol through proxy entities that conceal user IP addresses from service providers (SPs). We also introduce a proof-of concept implementation to demonstrate the protocol’s feasibility and analyze its performance. Finally, we conclude that the protocol realizes secure and anonymous communications between users and SPs with practical performance. User IP address is naturally visible in the IP packets sent from the user, and it cannot simply be erased or forged to allow bi-directional communication. One approach for this is to use intermediate agents that send packets on behalf of the actual user terminal, and several such protocols have already been proposed.

EXISTING SYSTEM	PROPOSED SYSTEM
EXISTING CONCEPT:- In existing system user will create public key at one time. These key will be used through out communication Anonymous communication channels should have certain authentication mechanisms because such channel could incubate criminal communication.	PROPOSED CONCEPT: - In our proposed system user will create temporary ID for each session.Server use this ID as public key By employing identity-based encryption for encrypting packets without sacrificing anonymity, and group signature for anonymous user authentication
EXISTING TECHNIQUE:- Intermediate agents protocol	PROPOSED TECHNIQUE:- Anonymous communication protocol
TECHNIQUE DEFINITION:- Intermediate agents that send packets on behalf of the actual user terminal. It will use one public key throughout transaction	TECHNIQUE DEFINITION:- This Protocol uses identity-based encryption (IBE) to encrypt content without identifying keyholders.IBE can set arbitrary values on public keys; thus, it can allow a user to select a temporary ID for each session that the server can use as a public key.
DRAWBACKS:- Less secured IP address is visible in IP packets	ADVANTAGES:- Secured communication  IP address not visible.