Balancing performance, accuracy, and precision for secure cloud transactions
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This document discusses balancing performance, accuracy, and precision for secure cloud transactions. It identifies that inconsistent authorization policies or user credentials in distributed transactional database systems deployed on clouds can lead to unsafe access decisions. It proposes enforcing increasingly stringent policy consistency constraints and a Two-Phase Validation Commit protocol, a modified version of the basic protocol, to guarantee transaction trustworthiness. Analytical and simulation evaluations are used to determine the best approach for decision makers.
Balancing performance, accuracy, and precision for secure cloud transactions
- 1. BALANCING PERFORMANCE, ACCURACY, AND PRECISION FOR SECURE CLOUD TRANSACTIONS ABSTRACT: In distributed transactional database systems deployed over cloud servers, entities cooperate to form proofs of authorizations that are justified by collections of certified credentials. These proofs and credentials may be evaluated and collected over extended time periods under the risk of having the underlying authorization policies or the user credentials being in inconsistent states. It therefore becomes possible for policy-based authorization systems to make unsafe decisions that might threaten sensitive resources. In this paper, we highlight the criticality of the problem. We then define the notion of trusted transactions when dealing with proofs of authorization. Accordingly, we propose several increasingly stringent levels of policy consistency constraints, and present different enforcement approaches to guarantee the trustworthiness of transactions executing On cloud servers. We propose a Two-
- 2. Phase Validation Commit protocol as a solution, which is a modified version of the basic Two-Phase Validation Commit protocols. We finally analyze the different approaches presented using both analytical evaluation of the overheads and simulations to guide the decision makers to which approach to use. EXISTING SYSTEM: Interesting consistency problems can arise as transactional database systems are deployed in cloud environments and use policy-based authorization systems to protect sensitive resources. In addition to handling consistency issues among database replicas, we must also handle two types of security inconsistency conditions. First, the system may suffer from policy inconsistencies during policy updates due to the relaxed consistency model underlying most cloud services. For example, it is possible for several versions of the policy to be observed at multiple sites within a single transaction, leading to inconsistent (and likely unsafe) access decisions during the transaction.
- 3. Second, it is possible for external factors to cause user credential inconsistencies over the lifetime of a transaction. For instance, a user’s login credentials could be invalidatedor revoked after collection by the authorization server, but before the completion of the transaction. DISADVANTAGES OF EXISTING SYSTEM: Insecure Data’s. Time takes too long for authentication. Requiring expensive infrastructure. PROPOSED SYSTEM: We propose several increasingly stringent levels of policy consistency constraints, and present different enforcement approaches to guarantee the trustworthiness of transactions executing on cloud servers. We propose a Two-Phase Validation Commit protocol as a solution, which is a modified version of the basic Two-Phase Validation Commit protocols. We finally analyze the different approaches presented using both analytical
- 4. evaluation of the overheads and simulations to guide the decision makers to which approach to use. ADVANTAGES OF PROPOSED SYSTEM: Safe transactions, that identifies transactions that are both trusted and conform to the ACID properties of distributed database systems. Two-Phase Validation Commit (2PVC) protocol that ensures that a transaction is safe by checking policy.
- 6. SYSTEM CONFIGURATION:- HARDWARE REQUIREMENTS:- Processor - Pentium –IV Speed - 1.1 Ghz RAM - 512 MB(min) Hard Disk - 40 GB Key Board - Standard Windows Keyboard Mouse - Two or Three Button Mouse Monitor - LCD/LED SOFTWARE REQUIREMENTS: Operating system : Windows XP. Coding Language : .Net Data Base : SQL Server 2005 Tool : VISUAL STUDIO 2008.
- 7. REFERENCE: Marian K. Iskander, Tucker Trainor, Dave W. Wilkinson, Adam J. Lee, Member, IEEE, and Panos K. Chrysanthis, Senior Member, IEEE, “Balancing Performance, Accuracy, and Precision for Secure Cloud Transactions” IEEE TRANSACTIONS ON PARALLEL AND DISTRIBUTED SYSTEMS, VOL. 25, NO. 2, FEBRUARY 2014