Information is wealth in this modern competitive world. Billions of messages are exchanged all over the world every day through many channels. Advancement in information technology has enabled individuals and organizations to keep their communication channels secure. Message encryption is being used extensively to protect the privacy of sensitive information.
Message encryption is the process of converting a readable message into enciphered text in order to keep the content private. The message thus encrypted is transmitted to the recipient, who will be able to read it with the help of a private key. Technology allows even attachments to be protected.
Message encryption uses keys to convert plain text to scrambled text (cypher text) and again from scrambled text to plain text. There are two mathematical keys (a key is a number), public key and private key. Public key is used to encrypt the message. Recipient with the corresponding private key can decrypt the message. To encrypt a message to a specific recipient, the sender must have that recipient’s public key. The sender then uses this public key to encrypt the message which the recipient can read by using his private key. The process actually begins by the sender sending digitally signed message to the recipient, which gives the recipient the sender’s public key. The recipient replies to the message by sending his or her public key. Once both the parties have each other’s public key, they can communicate using message encryption process there by keeping their sensitive information secure.
Message encryption is a blessing in today’s networked world where most of the data flows through shared systems. Many encryption techniques are in use today and the technology is still evolving.