Difference between session key and master key

Assignment Help Basic Computer Science

Reference no: EM132440149

1.1. What are the essential ingredients of a symmetric cipher?

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

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

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

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

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

7 What is triple encryption?

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

2.1 List three approaches to message authentication.

2. What is a message authentication code?

3. What properties must a hash function have to be useful for message authentication?

4. In the context of a hash function, what is a compression function?

5. What are the principal ingredients of a public-key cryptosystem?

6. List and briefly define three uses of a public-key cryptosystem.

7. What is the difference between a private key and a secret key?

8. What is a digital signature?

3.1 List ways in which secret keys can be distributed to two communicating parties.

2. What is the difference between a session key and a master key?

3. What is a key distribution center?

4. What entities constitute a full-service Kerberos environment?

5. In the context of Kerberos, what is a realm?

6. What are the principal differences between version 4 and version 5 of Kerberos?

7. What is a nonce?

8. What are two different uses of public-key cryptography related to key distribution?

9. What are the essential ingredients of a public-key directory?

10. What is a public-key certificate?

11. What are the requirements for the use of a public-key certificate scheme?

12. What is the purpose of the X.509 standard?

13. What is a chain of certificates?

14. How is an X.509 certificate revoked?

Reference no: EM132440149

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