 ### What Is Cryptography With Example

Cryptography is the process of creating a secure communication system. It involves the use of encryption algorithms to prevent the transmission of confidential information. Different types of ciphers are used to protect data. Some ciphers use simple translation codes, while others use complex algorithms. In the past, simple codes were enough to encrypt handwritten notes. However, modern computers are powerful enough to break even simple codes in a few seconds. Therefore, modern cryptography involves developing encryption techniques that are difficult for supercomputers to break.

### Public key cryptography

In public key cryptography, the public key is shared among all parties who need the encrypted data. Its private key works with the result of a calculation but cannot tell which factors were used to produce the result. Therefore, reverse calculation is difficult because there is no simple mathematical procedure to break this system. Typically, large numbers are used, which are harder to crack.

To understand public key cryptography, it’s helpful to consider a simple example. Imagine a scenario in which Julia and Cesar are sending encrypted messages to each other. They’re using computers to communicate with one another, and the messages are encrypted using public key cryptography. These messages are not read by anyone but only the recipient’s private key can decrypt them.

Public key cryptography uses a public and private key to encrypt data and send it securely across the internet. The public key is a large prime number that’s mathematically related to the private key. Because of this mathematical relationship, …

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