Security challenges of integration of hash functions into cloud systems

Cloud Computing is a new paradigm for the IT industry. IT services such as infrastructures, platforms and applications are provided remotely, over the Internet, and all resources are virtualized. Challenges about confidentiality, integrity, authenticity, and non-repudiation are still opened representing the main concerns that reduces the growth of cloud computing. Hash based mechanisms are thus mainly used for message authentication and this paper analyses imposed security issues over clouds. To this end, recently developed semantically enhanced Cyber Security Model (CSM) is extended representing a promising solution capable to address all issues of heterogeneity, shared parties and different interests over clouds.