Cryptographic Systems

Cryptographic Systems

1. Cryptographic services

   • Secure comms
     • Protect data flow
     • Authentication
       • Auth service
       • Nonrepudiation service
     • Integrity
       • Messages not altered
     • Confidentiality
       • Ensures privacy
       • Encryption
       • Hash function
   • Cryptography
     • Algorithm
       • Cipher
         • Encrypt
         • Decrypt
       • Transposition
       • Substitution
       • One-time pad
   • Cryptoanalysis
     • Cracking code
     • Brute-forced method
   • Cryptology
     • Cryptography
     • Cryptoanalysis

2. Integrity n' Authentication

   • Hash function
     • MD5
     • SHA-1
     • SHA-2
       • SHA-224
       • SHA-256
       • SHA-384
       • SHA-512
   • Message Authentication Code
     • HMAC auth code
       • HMAC-MD5
       • HMAC-SHA-1
   • Management considerations
     • Characteristics
       • Key generation
       • Key verification
       • Key exchange
       • Key storage
       • Key lifetime
       • Key revocation
     • Terms
       • Key length
       • Keyspace

3. Confidentiality

   • Algorithms
     • Symmetric
       • Stream ciphers
         • SEAL
         • RC4
       • Block ciphers
         • 3DES
         • DES
         • AES
     • Asymmetric
       • DSS
       • RSA
       • DH
       • DSA

4. Public Key

   • Elements
     • Certificate Store
     • PKI certificate
     • Certificate database
   • Simple Certificate Enrollment Protocol (SCEP)
   • Topologies
     • Single Root PKI
     • Cross-certified CA
     • Hierarchical CA
   • Registration authority

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