Nerdfeed: Why Information Need to be Secured?

In the development of today, information security system are necessary, especially security data. Along with the emergence of a new technique, which is misused to steal data such information. Security of data is needed to hide the original message that is confidential, so that can not be known to the common person.

Information is divided into two, namely the information is confidential and information that is not confidential. Information that is not confidential largely ignored by most people. While the confidential information requested by most people.

Therefore, it appears an idea that can secure a such information. Thus, the emerging science of cryptography can change the information / original message can be text / image information confidential becomes difficult to solve. Because the data / information has been changed randomly. Many cryptographic techniques that have been used to keep the information / data. Examples of using the technique Caesar cipher, vigenere cipher, cipher hill, arnold's cat map, and others - others. Each - each of these techniques has advantages and disadvantages of each.