Deploying Domain Keys for Multilevel Access Control using Elliptic curve Cryptography

When users of one domain need to communicate with users of other domain securely, they need to share a key with them but it is tedious to manage the keys of all users. Hence a better technique DOMAIN KEYS can be used. Users may send the message from each user of the domain to the administrator of the domain which may take care of the signing process and verifier can also be integrated to verify the signature when the user of the domain receives any message. Most of the service providers avail some of the fruitful services to those parties that deserve for the services but to identify whether the party is authorized to avail the service and the level to which they deserve to avail it are much difficult to manage. Hence the scheme may be extended to make the signer decide the access level by giving the group key pertaining to a particular service group. For establishing a service group containing identical interest users, Elliptic curve cryptography is used. ECC offers considerably greater security for a given key size along with the domain key. The smaller key size also makes possible much more compact implementations for a given level of security, which means faster cryptographic operations, running on smaller chips or more compact software.