Question: 1) A symmetric key cryptographic algorithm generates a one-to-one mapping? Why? Note down one advantage and one disadvantage of using symmetric key cryptography. 2)Explain how

1) A symmetric key cryptographic algorithm generates a one-to-one mapping? Why? Note down one advantage and one disadvantage of using symmetric key cryptography.

2)Explain how public-key cryptography is used for identification. You may want to explain it with a pair of users, say, Bob and Alice.

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