Difference between a block cipher and a stream cipher

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Reference no: EM132314949

Question: 1. What are the essential ingredients of a symmetric cipher?

Question: 2. What are the two basic functions used in encryption algorithms?

Question: 3. How many keys are required for two people to communicate via a symmetric cipher?

Question: 4. What is the difference between a block cipher and a stream cipher?

Question: 5. What are the two general approaches to attacking a cipher?

Question: 6. Why do some block cipher modes of operation only use encryption while others use both encryption and decryption?

Question: 7. What is triple encryption?

Question: 8. Why is the middle portion of 3DES a decryption rather than an encryption?

Reference no: EM132314949

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