Cryptographic Systems
What are Cryptographic Systems?
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Confidentiality has always been the major goal of cryptography. However, today much more is expected, namely - authentication, integrity, and non-repudiation. Cryptographic systems have evolved as a packaged set of countermeasures for protecting dialogues.
Cryptographic systems typically include the following for each dialog:
handshaking stage 1 - initial negotiation of security parameters for the chosen cipher suitehandshaking stage 2 - mutual authenticationhandshaking stage 3 - secure exchange of keys and other secretsongoing communication stage - message by message
Two important cryptographic systems are IPSec and SSL.
Explain some of the limitations of the SMTP/RFC 822?
State requirements for the process of message authentication.
Explain the term Caesar cipher.
What is meant by the term nonce?
Suppose you worked for a US- based company that wanted to develop its own MIB for managing a product line. Where in the object identifier tree would it be registered? ( Hint: You’ll have to do some digging through RFCs or other documents to answer this question.)
List the potential situations for confidentiality attacks for the user workstations in the typical business environment.
Specify the reasons for using the PGP?
Specify the important ingredients of the symmetric cipher?
Explain what is meant by the term message authentication? Describe the classes of message authentication function.
Specify some of the difference between master key and session key?
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