Discussion - 400-600 words with atleast 2 references

Below is the topic:

• What are cryptography and cryptanalysis?
• What is earlier reason for the use of cryptography?
• What is cryptographic key. And what is used for? What is a more formal name for a cryptographic key?
• List and explain the three basic operations in cryptography?
• What does it mean to be “Out of band”? Why is it important to exchange keys out of bank in symmetric encryption?

Guidelines: 

• Be in APA format including your references.
• Be 400–600 words long (not including title and references).
• Do not re-state the questions.
• Include two sources (i.e. two references).