Encryption : Encryption is the most effective way to achieve data security. To read an encrypted file, you must have access to a secret key or password that enables you to decrypt it. Unencrypted data is called plain text ; encrypted data is referred to as cipher text. Example of Encrypted message : $$@$%jnvksjJAJBDkje*&982377^&^923#@&:">""sjhkbcBKGDJB;''/;'C09283417)(*&^$ Thank you.. :)