audio encryption and decryption in matlab

audio encryption and decryption in matlab

This Algorithm Encrypts Audio file according to user input rate and then perform decryption to access the input information.Encryption is done for security reason for example if you want to transmit some personal audio file into some network and if some hacker hack your network and access that important audio file then he will be not able to perform decryption because data encrypted by sender can only perform decryption so sender may tell the decryption technique to one whom sender want to authorize access to the files.So Its a Process or a technique in which sender encodes messages and only authorize persons can decode these messages and this Technique is called cryptography.

Now Some Basic terms related to this topics.

Encryption Key

The Key which perform encryption on other which tells how to encode messages and without this encryption key we cannot perform decryption to decode our messages back and the key which is used for decryption is called secret decryption key and which is developed with the help of encryption key so for very efficient systems systems need a key generation algorithm that is for every encryption key changes randomly but here at this we are not going to see that we will just perform simple encryption because at this level we aren’t implementing this real time but in real time scenarios this must be considered an important part of system.

cipher

There are two types of encryption one is

Systematic key encryption in which Encryption Key and secret decryption key are same so both sending and receiving parties must these keys.

Public Key Encryption Sending side or anyone has access to encryption while receiving side contains only secret decryption key no other party contain this secret decryption key.

First Enter the amount of distortion you want to add.
Now then Extend Noise Samples According to Encryption Number.
Now you will have to write a code to insert a loop in encryption to embed information from audio to noise.
And in this you will have to skip some information and add noise in this way information at input become useless after encryption.