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what is information security

About Information Security

Effective Information Security incorporates security products, technologies, policies and procedures. No collection of products alone can solve every Information Security issue faced by an organization. More than just a set of technologies and reliance on proven industry practices is required, although both are important. Products, such as firewalls, intrusion detection systems, and vulnerability scanners alone are not sufficient to provide effective Information Security.

Information security is becoming increasingly important. Globalization of the economy leads to a growing exchange of information between organizations (their employees, customers and suppliers) and a growing use of networks, such as the internal company network, connection with the networks of other companies and the Internet.

Why information security
1. Consistent security practices and IT maintenance procedures ensures a smooth road for business operations.
2. Secure and stable network assures that information is safeguarded.

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Key features

Confidentiality
Confidentiality refers to preventing the disclosure of information to unauthorized individuals or systems. For example, a credit card transaction on the Internet requires the credit card number to be transmitted from the buyer to the merchant and from the merchant to a transaction processing network. The system attempts to enforce confidentiality by encrypting the card number during transmission, by limiting the places where it might appear (in databases, log files, backups, printed receipts, and so on), and by restricting access to the places where it is stored. If an unauthorized party obtains the card number in any way, a breach of confidentiality has occurred.

Integrity
In information security, data integrity means maintaining and assuring the accuracy and consistency of data over its entire life-cycle.[16] This means that data cannot be modified in an unauthorized or undetected manner. This is not the same thing as referential integrity in databases, although it can be viewed as a special case of consistency as understood in the classic ACID model of transaction processing. Integrity is violated when a message is actively modified in transit. Information security systems typically provide message integrity in addition to data confidentiality.

Availability
For any information system to serve its purpose, the information must be available when it is needed. This means that the computing systems used to store and process the information, the security controls used to protect it, and the communication channels used to access it must be functioning correctly. High availability systems aim to remain available at all times, preventing service disruptions due to power outages, hardware failures, and system upgrades. Ensuring availability also involves preventing denial-of-service attacks, such as a flood of incoming messages to the target system essentially forcing it to shut down.

Authenticity
In computing, e-Business, and information security, it is necessary to ensure that the data, transactions, communications or documents (electronic or physical) are genuine. It is also important for authenticity to validate that both parties involved are who they claim to be. Some information security systems incorporate authentication features such as "digital signatures", which give evidence that the message data is genuine and was sent by someone possessing the proper signing key.

Non-repudiation
In law, non-repudiation implies one's intention to fulfill their obligations to a contract. It also implies that one party of a transaction cannot deny having received a transaction nor can the other party deny having sent a transaction.

It is important to note that while technology such as cryptographic systems can assist in non-repudiation efforts, the concept is at its core a legal concept transcending the realm of technology. It is not, for instance, sufficient to show that the message matches a digital signature signed with the sender's private key, and thus only the sender could have sent the message and nobody else could have altered it in transit. The alleged sender could in return demonstrate that the digital signature algorithm is vulnerable or flawed, or allege or prove that his signing key has been compromised. The fault for these violations may or may not lie with the sender himself, and such assertions may or may not relieve the sender of liability, but the assertion would invalidate the claim that the signature necessarily proves authenticity and integrity and thus prevents repudiation.

Information security analysts
Information security analysts are information technology (IT) specialists who are accountable for safeguarding all data and communications that are stored and shared in network systems. In the financial industry, for example, information security analysts might continually upgrade firewalls that prohibit superfluous access to sensitive business data and might perform defenselessness tests to assess the effectiveness of security measures.

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