Cryptography is a technique used to send encrypted messages that only the intended recipient can understand using a secret code. Encryption is the process of encoding a message so it is incomprehensible without the code, while decryption is using the pre-established code to understand the encrypted message. Cryptography has been used throughout history for both military purposes and casual uses such as by poets.

2. The cryptography is a technique that is used when you want to send a message
that only the recipient can understand.
The cryptography is usually used when people who communicate are distant.

3. Encryption
The encryption is the process that makes a message incomprehensible using a
secret code.

4. Decryption
When you receive an encrypted message you have to use the code established
before to understand the message.

5. Uses
In the history the cryptography has been used in various ways, for example for
military purposes, but also by the poets for fun.