In general, databases are stored and managed on computers having any one of the three architectures: 1.Server Architecture, 2.Parallel Architecture, and 3.Distributed Architecture. The server architecture has two-tier - Tier 0 and Tier 1. In this architecture, clients act as the front-end at Tier 0 and the DBMS acts as a back-end at Tier 1. Parallel architecture allows multiple processors to run simultaneously, and the resources such as memory, processor and databases be shared among them. But in shared nothing parallel computers, the processors share neither memory nor storage device among them. Distributed architecture is the third type of architecture, which is similar to that of the Shared Nothing Architecture in parallel computers. Databases maintained by computers connected using distributed architecture are known as distributed databases. Distributed databases require a mechanism for maintaining the privacy of data in transit and data at rest. One of the mechanisms available for securing data privacy of data stored in a distributed environment is Encryption. In this paper, the authors proposed a framework in which Unstructured Data can be converted to Structured Data and stored in a database in an encrypted format using Advanced Encryption Algorithm - a kind of block cipher.

Database Management System, Server, Parallel and Distributed Architecture, Data Privacy, Symmetric Encryption, Searchable Encryption