What is Cryptography

Cryptography is essentially the art of keeping information safe. It uses a bunch of different techniques, like codes and algorithms, to scramble up data (encryption) so only authorized people can understand it.

• It's like writing a secret message in a code book that only your friend with the key can decipher.

Breakdown of cryptography:

• Encryption:

  • This is the process of taking plain, readable information and turning it into an unreadable mess called ciphertext. Think of it as scrambling an egg – you can't un-scramble it back into a perfect egg, but you can still use it for cooking.

• Decryption:

  • This is the flip side of encryption, where the ciphertext is turned back into readable plaintext. This is done with a special key, kind of like needing the right key to unlock a door.

There are different types of cryptography, each with its own strengths and weaknesses. Two main ones are:

• Symmetric cryptography:

  • Imagine two friends sharing a secret code word. Both can encrypt messages using the code word and decrypt them using the same code word.

• Asymmetric cryptography: T

  • his is like having two different keys – a public key that anyone can use to encrypt messages, and a private key that only the recipient has to decrypt them. It's like a public mailbox where anyone can put things in, but only the person with the key can open it and get them out.

Where is Cryptography used?

Cryptography is all around us in the digital world, keeping our information secure. It's used for things like:

• Protecting credit card numbers and passwords when you shop online
• Securing your emails and messages
• Safeguarding online banking transactions