ENCRYPTION

In this 21^st century we have moved into a digital world where most of use the Email for data transmission. Some of us don’t like to share our data in the internet with the unauthorized people  but only to a specific people .So we need a specific technology to keep our data secure from the unauthorized people  this is called as encryption.. Encryption is a technique or a process where the data is encoded using different methods so that one cannot access the data until unless he has got the key to unlock the encryption. And the process of bringing back to the original form is called decryption.

TYPES OF  ENCRYPTION:

                         Cryptography is the study of  keeping the digital  data secure. Initially the encryption is based on replacing the alphabets with different symbols and the decryption where also based on the same. As we are in the fast moving world we cannot use this older type of encryption because  its slow .So the cryptographer improved the encrypting technique .Modern computer security encryption systems can be classified into two categories.

·  Symmetric-key encryption

·  Asymmetric-key encryption

Modern encrypting technique are far more complex than the older one and the combination key in  encryption are based on algorithms.

SYMMETRIC-KEY ENCRYPTION:

In the symmetric-key encryption the encryptor has a unique key which helps in encrypting the data that is to be transmitted .The receiver also has the same key for decryption of data. Each transition has a unique key for transmitted data. The 56 bit data encryption standard was the first encryption algorithm in the Symmetric-key encryption. This was developed byUnited States for the encryption and decryption of data. This were easily hacked so they created a 128bit advance encryption standards. This are still used in data security of email ,atm encryption and many more.

ASYMETRIC-KEY ENCRYPTION:

Asymmetric-key encryption is little bit similar  to the previous one but the code for encrypting the data is different from the decrypting key.In digital signatures, has of the message is calculated first and then it is used as privatekey or senders code . Public key or receiver key is compared first and then the private key is used to decode the data.

SSL AND TLS:

SSL stands for Secure Socket Layer, TLS stands for Transport layer Transport layer security. Both the SSL and TLS are the encryption protocol.. SSL and TLS both uses asymmetric or public key encryption technique to encrypt the network connection segments. Basic and foremost SSL technique was developed by Netscape for providing transport layer security. SSL became very popular among all browsers and web servers as it was very efficient to transfer the sensitive data .Later their wear upgrades in the SSL and  then the TLS were released.If you have noticed while making bank transfers, the http changes to https once you login to the bank's official website. Https uses the TLS technique to make the data transfer more secure. TLS checks three important things before transacting and they are whether the certificate of website is a valid one or not, secondly it checks whether the certificate belongs to the corresponding trusted website or not, and third one is whether the sending website does have a valid relationship with the received certificate or not. Once all above things are verified, then one computer generates asymmetric key and sends it to the other computer.

CONLCLUSION:

     Some of the hackers  will hack any type of encryption. So in this case data could not be kept secured so the research are going on the field of encryption.