Abstract-Cloud storage has rapidly become a cornerstone of many businesses and has moved from an early adopters stage to an early majority, where we typically see explosive deployments. As companies rush to join the cloud revolution, it has become vital to create the necessary tools that will effectively protect users' data from unauthorized access. Nevertheless, sharing data between multiple users' under the same domain in a secure and efficient way is not trivial. In this paper, we propose Sharing in the Rain -a protocol that allows cloud users' to securely share their data based on predefined policies. The proposed protocol is based on Attribute-Based Encryption (ABE) and allows users to encrypt data based on certain policies and attributes. Moreover, we use a Key-Policy Attribute-Based technique through which access revocation is optimized. More precisely, we show how to securely and efficiently remove access to a file, for a certain user that is misbehaving or is no longer part of a user group, without having to decrypt and re-encrypt the original data with a new key or a new policy.
The authors of REF proposed the use of radio frequency identification (RAIN) protocol, that allow users to securely access their data on the same cloud used by other patients.
Sharing in the rain: Secure and efficient data sharing for the Cloud
2016 11th International Conference for Internet Technology and Secured Transactions (ICITST)
2016 11th International Conference for Internet Technology and Secured Transactions (ICITST)
Computer Science