Secure grid-based mobile agent platform by instance-oriented delegation

An instance-oriented security mechanism is proposed to deal with security threats in building a general-purpose mobile agent middleware in Grid environment. The proposed solution imports security instance, which is an encapsulation of one set of authorizations and their validity specifications with respect to the agent's specific code segments, or even the states and requests. Study shows this mechanism can inject large flexibility and scalability into the security framework, and can avoid the inefficiency and potential damages obscuring in a conventional linear delegation model.