期刊名称：International Journal of Computer Science and Network
印刷版ISSN：2277-5420
出版年度：2017
卷号：6
期号：3
页码：446-449
出版社：IJCSN publisher
摘要：Need for storing large amount of data in the cloud is increasing day by day. So, this makes securing data in the cloud more
important. Several methods used to sign each block present in the cloud and user had to sign each block for getting access to the data
from the cloud. For some security and privacy issues, when a user leaves the cloud or misbehaves in cloud, the respective user must be
revoked from the cloud. So, this revoked user should no longer be able to access and modify shared data, and the signatures generated by
this revoked user are no longer valid in the cloud. Therefore, although the content of the data is not changed during user revocation, the
blocks, which were previously signed by the revoked user, still need to be signed again by an existing user in the group. Again signing
each block is very tedious task to be done. So, to overcome the above disadvantages a new concept of one time password is to be used
here so as to protect the files that are been stored in the cloud. Any user, either new or already registered user, he/she will have to login to
the system first. Another new algorithm namely AROcrypt encryption method is to be implemented in this system. Also one more
encryption technique as Rijndael technique is also implemented so as to provide better security for the data stored in cloud.
关键词：Cloud Computing; AROcrypt; Rijndael Technique; One Time Password
