Consider the following scenario: The ABC Bank has many ATM branches all over the country. The customers of the bank use these machines mainly for withdrawing money. Further they can transfer money from one account to another using these machines. Also they can deposit any amount of money into their accounts. The customers can contact a banking assistant through the system if any error occurred during a transaction. The ATM can be filled only by cashier. The system should authenticate the users before they are allowed to use it for the transactions mentioned above. Draw use case diagram for the above scenario   Can I have a step-by-step explanation on drawing the use case diagram with the completed use case diagram?

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Cryptography

Cryptography is a term used in computer science to describe secure information and communication techniques that transform messages in difficult-to-decipher ways using mathematical concepts and a set of rule-based calculations known as algorithms.