Cloud security consists of security measures to protect cloud-based systems and data, by introducing authentication rules for all individuals involved in it. However, such security measures may have fallen short. In one such case is the problem of security threats where the user that requests data, after getting access to the said data may try to send it to reveal it to a certain unauthorized user. This could potentially cause a crippling loss to the content provider. The content provider uploads cloud-based media files as encrypted format. When a user requests access to this content, the content provider rewrites the content using the new key and sends it to the requested user. After accessing cloud-based content by users, if they republish this content in the cloud, then this file could not be uploaded to the cloud and are considered users of unscrupulousbehaviour. Allows secure distribution of exported media content to authorized users, while allowing you to track and redistribute illegal content in an appropriate manner. This paper analyses how water marking and bi directional proxy re-encryption can be used to reduce the security threat of unauthorized content sharing in cloud environment.

filtering, Global recommending, Cluster, Quantization, Collaborative, Security