Symmetric Key Cryptography Using MATLAB | @MATLABHelper Blog

In our day-to-day life, we are sending and receiving much information from the internet. This information is transmitting through a transmission line, this channel is always insecure, and anything can be seen by anyone, not only just seeing they can actually modify the data. In this insecure channel, all our information is not actually passed by what we send. Data will be encrypted before sending it into the channel, and the encrypted is transferred through the transmission line. Now even if anyone captures the data, then they will get the encrypted data and not the actual data. You might get one question of how the actual receiver will get the actual data? Yes, without the key and algorithm used by the sender, it is impossible to retrieve the actual data. #Symmetric encryption was the only type of encryption in the 1970’s. Before beginning, we define some terms. An original message is called Plaintext, while the coded message is called Cipher text. The process of converting from plaintext to cipher text is known as Encryption or Enciphering; restoring the plaintext from the cipher text is Decryption or Deciphering. Watch the video or read the blog to understand the topic.

0:00 Introduction
0:32 Understanding concept behind Symmetric Key Cryptography
2:59 MATLAB code for Symmetric Key Cryptography
6:04 Running code and viewing result

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[coderoom]

Again question arise how we share key with receiver