Survey and Analysis for Achieving the Security of Data in Cloud

Cloud computing is on-demand access to computer system resources through the internet. Among various services provided by the cloud, most prominent is the cloud for storage. Because cloud services are present over the internet, which invites some trust issues among customers regarding integrity and confidentiality about the data, it is the challenge for the cloud to assure customers that their data is safe and can be retrieved whenever they want. This paper presents a survey of various schemes that applied to achieve confidentiality and integrity in the cloud system. Generally, encryption/decryption schemes and hashing techniques are used to obtain privacy and integrity, respectively. This paper also gives a comparative study of some encryption/decryption schemes as well as some hashing schemes.