| PGP, PGP/MIME, OpenPGP,S/MIME |
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PGP (Pretty Good Privacy) encryption has been around for some time. (Some time = A long time on a computer scale, but a very short time on a history of cryptography scale.) |
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| The Chinese Remainder Theorem |
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| Solving Two Congruences, A More General Theorem, Solving Lots of Congruences
Explicit Formulas |
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| Web Security |
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| Protect web content from those who don’t have a “need to know”
Require users to authenticate using a userid/password before they are allowed access to certain URLs
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| System Security |
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| Like other database systems, the Teradata provides solutions for system security. Security is the protection of data against unauthorized access. |
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| Simplified DES |
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| Developed 1996 as a teaching tool Santa Clara University\
Prof. Edward Schaefer Takes an 8-bit block plaintext, a 10 –bit key and produces an 8-bit block of ciphertext
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| Network Security |
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| The art of war teaches us to rely not on the likelihood of the enemy's not coming, but on our own readiness to receive him; not on the chance of his not attacking, but rather on the fact that we have made our position unassailable.
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| RSA Algorithm |
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| RSA Algorithm topics is discused in this chapter |
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| Authentication Applications |
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| Introduction to KERBEROS,How Kerberos works?,Comparison between version 4 and 5
Certificates,X.509 Directory Authentication Service,Conclusion |
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| Stream Ciphers |
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| Stream ciphers are a very important class of encryption algorithms. These notes explain what stream ciphers are, explain common subclasses of stream ciphers and discuss the attack models relevant to stream ciphers. |
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| Digital Signature, Digital Certificate |
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| Cryptography Secret-key algorithms,Public-key algorithms,Message-Digest algorithms
Digital Signature,Digital Certificate,Public Key Infrastructure (PKI),Secure Electronic Transaction (SET)
Summary |
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| MD5 & Hash Encryption |
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| Purpose of MD5 and Hash Encryptions Examples,MD5 Algorithm,Explanation of Possible Security Risks
Practical Applications Through Code,Possible Future Security Risks
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| Malicious Software |
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| Malicious software is one of the concerns of the contemporary computing environment. Malcontents, pranksters, vandals, and adversaries
all have the potential ability to disrupt the conduct of our computing business.
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| LFSR sequences |
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| Symmetric encryption algorithms are divided into two main categories,
block ciphers and stream ciphers. |
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| The Legendre and Jacobi Symbols |
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| The Legendre and Jacobi Symbols and formula are discused in this topic |
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| IP Security |
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| Provide Professional training,Support local business
Help our customers with their service quality |
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| Models of Information Security Analysis |
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| Definitions,Analysis framework,Cautionary factors,Sample analysis
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| Hash functions |
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| In a previous job, I was asked to look at hashing functions and got into a dispute with my boss about how such functions should be designed. |
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| Firewalls |
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| A choke point of control and monitoring,Interconnects networks with differing trust
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| Fermat and Euler’s Theorems |
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| Prime Numbers,Prime Factorization,Relatively Prime Numbers |
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| ElGamal Public-Key Cryptosystem |
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| The Order of an Element. Primitive Roots,ElGamal Public-Key Cryptosystem |
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| Electronic Mail Security |
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| email is one of the most widely used and regarded network services
currently message contents are not secure,may be inspected either in transit,or by suitably privileged users on destination system
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| Discrete logarithms |
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| Given a primitive element g of a finite field GF(q), the discrete logarithm of a nonzero element
u Î GF(q) is that integer k, 1 £ k £ q - 1, for which u = gk. |
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| Hellman key exchange |
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| The Di±e{Hellman key exchange algorithm solves the following dilemma.Alice and Bob want to share a secret key for use in a symmetric cipher, but their only means of communication is insecure. |
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| Differential cryptanalysis |
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| Differential cryptanalysis, published in 1990 by Biham and Shamir [5, 6], was the first notable
cryptanalysis technique to be discovered outside the world’s intelligence agencies. |
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| DES, Triple-DES, and AES |
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| Symmetric Cryptography,DES: Data Encryption Standard,DESiderata |
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| Cryptography Types of ciphers |
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| Classical substitution ciphers,Transposition (permutation) ciphers,Polyalphabetic Ciphers |
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| Introduction to Congruences |
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| The study of congruences is fundamental in Number Theory, and its essential spirit can be captured very quickly by a simple, but important computational |
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| Classical (secret-key) cryptosystems |
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| In this chapter we deal with some of the very old or quite old cryptosystems that were primarily used in the pre-computer era |
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| Birthday-Attack |
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| Sometimes what we also need is collision resistance it is hard to find two random
messages M and M1 such that H(M)=H(M1), This is called birthday attack and is based on a birthday paradox |
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| Basic Number Theory |
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| Divisibility and primes Unless mentioned otherwise throughout this lecture
all numbers are non-negative integers. We say that a divides b,
denoted a|b if there’s a k such that ka = b. We say that p is prime if for
a > 0, a|p only for a = 1 and a = p |
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