While cryptosystem is the method of encrypting and decrypting data. Encryption is the process of changing data into a form that can be read only by the intended receiver. While decryption is the process of decoding data that has been encrypted intoa secret format. To decipher the message, the receiver of the encrypted data must have the proper decryption key. In traditional encryption schemes, the sender and the receiver use the same key to encrypt and decrypt data.
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. An asymmetric encryption is an encryption system in which the sender and receiver of a message share a single, common key that is used to encrypt and decrypt the message. Symmetric-key systems are simpler and faster, but their main drawback is that the two parties must somehow exchange the key in a secure way. One example of an asymmetric encryption system is the Data Encryption Standard, DES . Public-key encryption is a cryptographic system that uses two keys opposed to an asymmetric encryption that only uses one common key.