What is network cryptography?

Cryptography is science and study of coded communication. It is used recreationally, but also has important uses in many types of security applications. Network cryptography refers to the use of cryptography on computer networks. Its application is used to ensure data security before change and theft. When network cryptography is well done, it helps to reduce cyber crime and cyberrrorism.

Cryptography serves four specific purposes. First, this helps to ensure privacy and control parties that have data access. Second, it helps to ensure integrity and ensure that the data does not change from the original transmission. Thirdly, used in verification, system to prove identity identity and - in extension - is the right to do what it does, such as signing a credit card purchase. Finally, it provides non -valuation, which ensures that the sender actually and undeniably created a message.

encryption systems used in network cryptography are two main types. They can be ether symmetricKé encryption systems also called cryptography Secret Key (SKC), on the one hand, or asymmetric or public encryption systems, also called Public Key (PKC) cryptography. The main difference between the two systems is that while the "secret" method uses a single key for both encryption and data decryption, the "public" method uses two keys, one for encryption and the other for decryption. The original Symmetrical Key encryption system, DES (data encryption system) was replaced by AES (Advanced Encryption Standard). The public key encryption system was further ensured using digital certificates that have become an important part of the network cryptographic system.

In the public key encryption system, the dated digital certificates play an important role in network cryptography. If the digital certificate issued by the Certification Office (CA) - a trusted third party such as Thawte® or Verisign® - verified by the user's web browser.Erese key in the certificate. If the verification fails, the user is announced and may decide to leave the website or trust the website in spite of the failure.

Secure socket Layers (SSL) is one implementation of public key encryption. The newer version is called the security of the transport layer (TLS), which may be the most famous use of network cryptography for most individuals. Using TLS is signaled in the web address window more due to "http" rather than "http". When a visitor lands on a secure website, such as a financial site, a web for payments, or the online banking web, and a digital certificate is verified, communication sent back and forth in encryption. Depending on the browser settings, the site visitor is warned against any transmission on the site that is not encrypted.