Encryption and Security Concepts

What is encryption?

How does encryption work?

What are the four main security concerns when data is transmitted?

What are the two main types of encryption systems?

• Symmetric encryption

• Asymmetric encryption

What are Plaintext and Ciphertext? How do they interact?

What is Quantum Cryptography?

How does quantum cryptography work?

How key is shared? A user (or sender) can suggest a key by sending stream of randomly polarized photons. If someone tries to intercept the key, the recipient comes to know and it will discard the received key and asks sender to retransmit new stream of randomly polarized photons.

What are the benefits or advantages of Quantum Cryptography?

What are the drawbacks or disadvantages of Quantum Cryptography?