Then this scheme uses redundancy encoding to make shares. It uses secret sharing to split an object into fragments at the first level. Potshards separates security and redundancy by utilizing two levels of secret sharing, while Subbiah and Blough’s work only uses one level of secret sharing. Secret sharing is mostly used in distributed storage system, but if the attackers have the opportunity to get enough parts, the original object still can be reconstructed. The research of Subbiah and Blough avoids the use of keyed encryption by using secret sharing threshold scheme that was introduced independently by Shamir and Blakley. Therefore, Rabin’s algorithm is always combined with keyed encryption by some distributed storage system. Nevertheless, it may stop malicious users from parsing information from one piece, and it still cannot prevent them from getting information from pieces. Rabin designed information dispersal algorithm (IDA) to deal with the security and reliability problem for the storage and transmission of data file in distributed systems.
#Cloud rubiks cube timer cracked
However, there is a tendency among users to keep passwords simple and memorable leading to the possibility of brute force attacks, and keys that provide adequate encryption today are likely to be cracked by computation effort in the future. In traditional researches, cryptographic algorithms are employed to ensure data confidentiality, such as OceanStore, FarSite, and PAST. The confidentiality in cloud systems is a big obstacle for users to step into it, as many users said “my sensitive corporate data will never be in the Cloud”. However, users’ lack of direct resource control in the cloud prompts concern about the potential for data privacy violations, particularly abuse or leakage of sensitive information by service providers. The importance of minimizing information leakage in a cloud environment is highlighted by the current use of the cloud infrastructure for applications that require strong confidentiality guarantees.Ĭloud environment denotes an architectural shift toward thin clients and conveniently centralized provision of computing resources.
IntroductionĪs cloud services become more and more popular, securing data information within cloud environments has become a critical requirement. Analyses and experiments show that this approach is efficient and useable for the confidentiality of user data in cloud storage system. These fragments are stored on randomly chosen servers within cloud environment. At the second phase, all cubes are unfolded and combined together as a cross-shaped cube, which will be partitioned into a few data fragments to guarantee that every fragment does not contain continuous bytes. Then logistic map is used to create rotation policies to scramble data information based on Rubik’s cube transformation. In every round, chaotic logistic maps generate pseudorandom sequences to cover the plaintext by executing Exclusive-OR operation to form the cipher. In EPPA, data object is organized to be several Rubik’s cubes executed for several rounds transformation at the first phase. In this paper, a new algorithm for data splitting called EPPA is presented to strengthen the confidentiality of data by two-phase process. Security and privacy issues present a strong barrier for users to adapt to cloud storage systems.