tailieunhanh - Lecture Data security and encryption - Lecture 14: Stream Ciphers and Random Number Generation

The comparatively late rise of the theory of probability shows how hard it is to grasp, and the many paradoxes show clearly that we, as humans, lack a well grounded intuition in this matter. In probability theory there is a great deal of art in setting up the model, in solving the problem, and in applying the results back to the real world actions that will follow. | Data Security and Encryption (CSE348) Lecture slides by Lawrie Brown for “Cryptography and Network Security”, 5/e, by William Stallings, briefly reviewing the text outline from Ch 0, and then presenting the content from Chapter 1 – “Introduction”. Lecture # 14 Review Multiple Encryption & Triple-DES Modes of Operation ECB, CBC, CFB, OFB, CTR, XTS-AES Chapter 6 summary. Chapter 7 – Stream Ciphers and Random Number Generation Opening quote. The comparatively late rise of the theory of probability shows how hard it is to grasp, and the many paradoxes show clearly that we, as humans, lack a well grounded intuition in this matter. In probability theory there is a great deal of art in setting up the model, in solving the problem, and in applying the results back to the real world actions that will follow. — The Art of Probability, Richard Hamming Opening quote. Random Numbers Random numbers play an important role in the use of encryption for various network security applications Brief overview of the use of random numbers in cryptography and network security is provided Focus on the principles of pseudorandom number generation Getting good random numbers is important, but difficult Random numbers play an important role in the use of encryption for various network security applications. In this section, we provide a brief overview of the use of random numbers in cryptography and network security and then focus on the principles of pseudorandom number generation. Getting good random numbers is important, but difficult. You don't want someone guessing the key you're using to protect your communications because your "random numbers" weren't (as happened in an early release of Netscape SSL). Traditionally, the concern in the generation of a sequence of allegedly random numbers has been that the sequence of numbers be random in some well-defined statistical sense (with uniform distribution & independent). In . | Data Security and Encryption (CSE348) Lecture slides by Lawrie Brown for “Cryptography and Network Security”, 5/e, by William Stallings, briefly reviewing the text outline from Ch 0, and then presenting the content from Chapter 1 – “Introduction”. Lecture # 14 Review Multiple Encryption & Triple-DES Modes of Operation ECB, CBC, CFB, OFB, CTR, XTS-AES Chapter 6 summary. Chapter 7 – Stream Ciphers and Random Number Generation Opening quote. The comparatively late rise of the theory of probability shows how hard it is to grasp, and the many paradoxes show clearly that we, as humans, lack a well grounded intuition in this matter. In probability theory there is a great deal of art in setting up the model, in solving the problem, and in applying the results back to the real world actions that will follow. — The Art of Probability, Richard Hamming Opening quote. Random Numbers Random numbers play an important role in the use of encryption