Abstract

“Cloud computing provides ubiquitous and on-demand computing of provisioning and de-provisioning of re-sources to the consumers based on pay-per usage in all the sectors.” Most health care organizations deals with large sets of data, highly imposes to data vulnerabilities leads to insecurity of data, thus confidentiality of data can be achieved by the use of encryption-and decryption mechanisms with the use of asymmetric key cryptography, which possess both authentication and confidentiality. With the use shared secret key between of key pairs of asymmetric key cryptography such as private/public key pairs are not in identical and it is known to the augmented users only. Public-key can be known to any-one such as known as public-key cryptography; and with private key the encrypted data is decrypted by the actual owner who owns it.Even with private-key digitally signed as the user is authenticated and it shows the proof-of-identity for the system. Key-pairs are distributed by KDC to the intended users only. With AS (authentication-server), present in key-domain authority (KDA) of KDC acts as dualauthentication/ authorization for the endorsed key as along with digital signature of the message and digital certificate is issued by KDA thus the Digital ID will be generated in hashed format with SSO.Thus, by means of dual-authentication based schemes it proves to be more secured for the given messages. Thus, Managed PKI which manages the keys , grants/access, revokes certificates provides a secure authentication and reliable communication in a specific cloud based platform to be in a secured way, by means of the use of dual-authentication based schemes such as in with {( (key, message, Digital signature), Digital certificate)}and {message, (key), Digital(Id)h}; to gain a secure cloud environment mainly in health care organizations to provide a better cloud services to the cloud users by in a protected cloud environment.