Ohne Titel

Cryptographic Systems

Cryptographic Services

Basic Integrity and Authenticity

Confidentiality

Public Key Cryptography

Securing Communications

Cryptography

Cryptonalysis

Cryptology

Authentication, Integrity and Confidentiality

Authentication

Authentication

Data Confidentiality

Creating Cipher Text

Transposition Ciphers

Substitution Ciphers

One-Time Pad Ciphers

Cracking Code

Methods for cracking code

Cracking the code

Making and breaking secret codes

Cryptanalysis

The secret is in the keys

Encryption

Data Encryption Standard

Alternate Encryption Algorithms

Diffie-Hellman Key Exchange

Twho classes of encryption algorithms

Symmetric and Asymmetric encryption

Symmetric Encryption

Symmetric block ciphers and stream ciphers

Choosing an encryption algorithm

DES symmetric encryption

DES summary

Improving DES with 3DES

3DES Operation

Software-optimized encryption algorithm

RC algorithms

Diffie-Hellman algorithm

DH operation

Cryptographic hashes

Integrity with MD5, SHA-1, AND SHA-2

Authenticity with HMAC

Key management

Cryptograhic hash function

Cryptographic hash function properties

Well-known hash functions

Message digest 5 algorithm

Secure hash algorithm

MD5 versus SHA

Keyed-hash message authentication code

HMAC operation

Hashing in cisco products

Characteristics of key management

Key length and keyspace

The keyspace

Types of cryptographic keys

Choosing cryptographic keys

Symmetric versus asymmetric encryption

Digital ssignatures

Public key infrastructure

Asymmetric key algorithms

Public key+private key=confidentiality

Private key+public key=authentication

Asymmetric algorithms

Types of asymmetric algorithms

Using Digital signatures

Code signing

Digital certificates

Using digital certificates

Digital Signature algorithms

Digitally signed cisco software

Public key infrastructure overview

PKI framework

Certificate authorities

Interoperability of different PKI vendors

Public-key cryptography standards

Simple Certificate Enrollment Protocol

PKI Topologies

Registration authority

Digital certificates and CAs