Lecture Data security and encryption

This chapter presents the following content: Security concepts: confidentiality, integrity, availability; security attacks, services, mechanisms; models for network (access) security; classical encryption techniques; symmetric cipher model.
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This chapter presents the following content: Models for network (access) security, classical encryption techniques, symmetric cipher model, have considered, classical cipher techniques and terminology, brute force, cryptanalysis of brute force, caesar cipher, cryptanalysis of caesar cipher.
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The contents of this chapter include all of the following: Symmetric ciphers, asymmetric ciphers, cryptographic data integrity algorithms, mutual trust, network security and internet security, system security, legal and ethical issues.
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This chapter presents the following content: Number theory, divisibility & GCD, modular arithmetic with integers, Euclid’s algorithm for GCD & inverse, Group, Ring, Field, finite fields GF(p), polynomial arithmetic in general and in GF(2n).
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The development of publickey cryptography is the greatest and perhaps the only true revolution in the entire history of cryptography. From its earliest beginnings to modern times, virtually all cryptographic systems have been based on the elementary tools of substitution and permutation, and can be classed as private/secret/single key (symmetric) systems. All classical, and modern block and stream ciphers are of this form.
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This chapter presents the following content: Outline of the course is discussed; topic roadmap & standards organizations; security concepts; X.800 security architecture; security attacks, services, mechanisms; models for network (access) security.
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This chapter presents the following content: Classical cipher techniques and terminology, brute force, cryptanalysis of brute force, caesar cipher, cryptanalysis of caesar cipher, monoalphabetic substitution ciphers, playfair cipher, polyalphabetic ciphers, vigenère cipher.
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This chapter presents the following content: Classical cipher techniques and terminology, monoalphabetic substitution ciphers, cryptanalysis using letter frequencies, playfair cipher, polyalphabetic ciphers, transposition ciphers, product ciphers and rotor machines, stenography.
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The objective of this chapter is to illustrate the principles of modern symmetric ciphers. For this purpose, we focus on the most widely used symmetric cipher: the Data Encryption Standard (DES). Although numerous symmetric ciphers have been developed since the introduction of DES, and although it is destined to be replaced by the Advanced Encryption Standard (AES), DES remains the most important such algorithm.
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This chapter presents the following content: Data encryption standard (DES) strengths of DES, differential & linear cryptanalysis, block cipher design principles, differential & linear cryptanalysis, block cipher design principles.
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This chapter presents the following content: Data encryption standard (DES), strengths of DES, differential & linear cryptanalysis, block cipher design principles, the AES selection process, the details of Rijndael – the AES cipher, looked at the steps in each round.
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The contents of this chapter include all of the following: multiple encryption & DES, why not doubleDES? tripleDES with twokeys, modes of operation, electronic codebook book (ECB), advantages and limitations of ECB, cipher block chaining (CBC).
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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.
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The contents of this chapter include all of the following: principles of publickey cryptography, RSA en/decryption, RSA key setup, why RSA works, exponentiation, efficient encryption, efficient decryption, RSA key generation, RSA security, factoring problem, progress in factoring.
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The contents of this chapter include all of the following: Message authentication requirements, message authentication using encryption, MACs, HMAC authentication using a hash function, CMAC authentication using a block cipher, pseudorandom number generation (PRNG) using Hash Functions and MACs.
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The contents of this chapter include all of the following: Digital signatures, ElGamal & Schnorr signature schemes, digital signature algorithm and standard, digital signature model, attacks and forgeries, digital signature requirements, direct digital signatures, ElGamal digital signature.
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The contents of this chapter include all of the following: symmetric key distribution using symmetric encryption, symmetric key distribution using publickey encryption, distribution of public keys, digital signatures, ElGamal & Schnorr signature schemes, digital signature algorithm and standard, X.509 authentication and certificates.
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The contents of this chapter include all of the following: Remote user authentication issues, authentication using symmetric encryption, the Kerberos trusted key server system, authentication using asymmetric encryption, federated identity management.
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The contents of this chapter include all of the following: IEEE 802.11 Wireless LANs, protocol overview and security, Wireless Application Protocol (WAP), protocol overview, Wireless Transport Layer Security (WTLS).
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The contents of this chapter include all of the following: secure email, PGP, S/MIME, domainkeys identified email, electronic mail security, email security, email security enhancements, pretty good privacy (PGP), PGP operation – authentication, PGP operation – confidentiality & authentication,...
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