期刊名称：International Journal of Computer Trends and Technology
电子版ISSN：2231-2803
出版年度：2013
卷号：4
期号：9-2
出版社：Seventh Sense Research Group
摘要：Some anonymous communication technique is being used by number of users for enabling online anonymity. One among those is TOR, which allow user to access internet facility privately by hiding their IP address from server. Anonymizing is a technique of stripping the identity of the user of internet from the identification data that accompanies it. For example, TOR use a node of networks which is volunteered by nature and they give support to TOR, by using which TOR can make redirection to his user towards network by hiding the information of their original IP address. But one issue has been seen from some time that some users of this kind of anonymous network has transmitted some abused information, they want to corrupt the information on server. Server do not having facility to block the user if server going to block it will block the normal response with entire anonymizing network, denying anonymous access to end user either he is honest or dishonest by nature, alike Nymble is a credential system that can be used in conjunction with anonymizing networks such as Tor to selectively block anonymous users while maintaining their privacy. Nymble offers a number of properties, such properties are ‘Anonymous Blacklisting’ in which a server can block the IP address of a misbehaving user without knowing identity of user IP address. ’Privacy’ in this honest and misbehaving user both remain anonymous. ‘Backward Anonymity’ in this the blacklisted user's previous activity remains anonymous/unlikable, and is refused future connections. ‘Blacklist status awareness’ in this a user can check whether he/she has been blocked before accessing services at the server. ‘Subjective Judging’ since misbehaving users are blocked without compromising their own privacy concern and the belonging server may have their own definition of misbehaving user. So our proposed system Nymble is a system in which sever can blacklist misbehaving user and therefore can block them without affecting their anonymity, means privacy of user is maintained by using Nymble either he/she will honest or misbehaved.
