2.1 What are the essential ingredients of a symmetric cipher? Answer The Questions

• 2.2 What are the two basic functions used in encryption algorithms?
• 2.3 How many keys are required for two people to communicate via a symmetric cipher?
• 2.4 What is the difference between a block cipher and a stream cipher?
• 2.5 What are the two general approaches to attacking a cipher?
• 2.6 Why do some block cipher modes of operation only use encryption while others use both encryption and decryption?
• 2.7 What is triple encryption?
• 2.8 Why is the middle portion of 3DES a decryption rather than an encryption? • 2.1 What are the essential ingredients of a symmetric cipher?
• 2.2 What are the two basic functions used in encryption algorithms?,
• 2.3 How many keys are required for two people to communicate via a symmetric cipher?,
• 2.4 What is the difference between a block cipher and a stream cipher?,
• 2.5 What are the two general approaches to attacking a cipher? Answer The Questions,
• 2.6 Why do some block cipher modes of operation only use encryption while others use both encryption and decryption?,
• 2.7 What is triple encryption?,
• 2.8 Why is the middle portion of 3DES a decryption rather than an encryption?

• 2.1 What are the essential ingredients of a symmetric cipher?
• 2.2 What are the two basic functions used in encryption algorithms?
• 2.3 How many keys are required for two people to communicate via a symmetric cipher?
• 2.4 What is the difference between a block cipher and a stream cipher?
• 2.5 What are the two general approaches to attacking a cipher?
• 2.6 Why do some block cipher modes of operation only use encryption while others use both encryption and decryption?
• 2.7 What is triple encryption?
• 2.8 Why is the middle portion of 3DES a decryption rather than an encryption? 