Found 1907 Articles for Data Structure

A security model is a computer model which can be used to identify and impose security policies. It does not need some prior formation it can be founded on the access right model or analysing computing model or computation model.A security model is a structure in which a security policy is developed. The development of this security policy is geared to a specific setting or instance of a policy. A security policy is based upon authentication, but built inside the confines of a security model. For example, designing a security model based upon authentication and authorization, one consider the 4-factor ... Read More

There are some elements of database security policy which are as follows −Acceptable Use − Anyone who has logged in to a corporate web over the last 10-15 years has likely been accepted with an acceptable use policy pop-up. The acceptable use policy represent proper and improper behavior when users access company web resources, such as restrictions on the use of company resources for non-businessassociated activities. It can also detail some monitoring the company does to provide the acceptable use policy.Scanning for Vulnerabilities − It is essential to find some vulnerabilities in a company's IT infrastructure before hackers do. Because ... Read More

Database security defines the collective measures used to protect and secure a database or database management software from unauthorized use and malicious cyber threats and attacks. Database security is a layer of information security. It is generally concerned with physical protection of data, encryption of data in storage and data remanence problem.Data security is generally defined as the confidentiality, availability and integrity of data. In another terms, it is all of the practices and processes that are in place to provide data is not being used or accessed by permitted individuals or parties. Data security provides that the data is ... Read More

Enterprise security is a multi-faceted concern that involves both the internal or proprietary business secrets of a company and the employee and user data associated to privacy laws. Enterprise security is targeted on data center, networking, and network server operations in practice, but technically start with human resources.Social engineering is the base cause of as many as two-thirds of some successful hacking attacks according to some security researchers. In social engineering attacks, weaknesses in human description, employee integrity, or personal gullibility are exploited by attackers to gain access to a web or data resources.Automated hacking attacks are script-driven and target ... Read More

There are various security approaches for mobile database environment which are as follows −Transparencies − There are basic security challenges tightening up because of mobility. It contained in these challenges is the dispute of transparencies, the transparency in the database sense against the transparency in the privacy sense. The first define the user will be satisfied from internal system knowledge.Secure Locations and Movements − The location is a sensible data only in connection with customer identities. The best protection of user whereabouts consists in the prevention of management of location information or user information, correspondingly. Movement information can be achieved ... Read More

There are some security issues in mobile database environment which are as follows −Data Security in mobile data transfer − Disconnections appear of ten in wireless communication. They can be forced by the user because of storing communication costs or be persuaded by faults. This situation can expose the data consistency, even without considering replicas. Disconnections are basically a problem of the fundamental layers of a database, but the database system is also answerable for preventing data loss in case of such unexpected disconnections with the help of transaction recovery.Metadata Security in mobile data transfer − It includes a user ... Read More

There are several issues in in multilevel security based on distributed security manager which are as follows −Authentication − User authentication is the basic line of defence for mobile and handheld devices including Personal Digital Assistants (PDAs). Traditional authentication structure rely on supporting a centralized database of user identities, making it complex to authenticate users in a different management domain as depicted.This mechanism for supporting security in mobile device is a difficulty for each system supporting safe access to precious, private data, or personalized services. The authentication structure should be distributed, and the several components of the authenticator need to ... Read More

There are various techniques of database security which are as follows −Secure network connection − The mobile database and the main database have to be synchronized at definite times. The synchronization is performed in the system software of the mobile database and is implemented over the http protocol.Encrypted local database − The local database on the mobile device is encrypted and every time the user opens the mobile database, it has to enter his password. In case the mobile device is taken or broken by an intruder, the data that is stored on the local database is not understandable. The ... Read More

There are various strategy of mobile database system which are as follows −Perfecting the Authentication Mechanism − It can avoid illegal terminal access deceptively and background information can be damaged, it is required for identity authentication, when mobile user and service database operating synchronous in the mobile database system.When it required to connect or disconnect mobile user, the mobile database needs to carry on identity verification itself, because the users input their user name and password, so can query, change the local caching after verification in mobile user. But the mobile user is needed to verify identity in the database ... Read More

A mobile database is said to be a database that can be related to by a mobile computing device over a mobile network .The client and server include wireless connections. A cache is maintained to hold recurrent information and transactions so that they are not lost due to connection failure.A database is a structured manner to organize data. This can be a list of contacts, price data or distance travelled. The application of laptops, mobiles and PDAs is increasing and possible to augment in the future with successively more applications locating in the mobile systems.Some applications like databases would require ... Read More