Secured cloud architecture for cloud service provider

Todays world is of cloud computing, cloud service provider (CSP) provides different resources and services to the user anytime anywhere over the internet. Due to this feature of cloud maintain security over cloud is complex. Cloud computing security issue are authentication of user, nonrepudiation, authority, confidentiality, privacy, availability, access control and checking the integrity of data. Here we have proposed the secure architecture for cloud which is going to map some cloud security issues that are authentication of user, confidentiality, privacy, access control and checking the integrity of data. For authentication of user system uses One Time Password (OTP), for data integrity check system uses modified SHA-2 hash function. This modified version of SHA-2 will provide better solution for PreImage attack and Collision attack and for encryption and decryption system uses standard Advanced Encryption Standards (AES) algorithm.