2024-01-22 10:12:47

UNB/Year 4/Semester 1/CS2418/9-27-2023.md

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+Lecture Topic: Public Key Infrastructure
+
+PKI protects information assets in several ways
+- Authentication (using digital certificates)
+- Integrity (content not changed)
+- Privacy (secure information)
+- Authorization (access control)
+- Nonrepudiation (can validate action)
+
+The Diffie Hellman key exchange provides no authentication of the two communicating partners, so it is vulnerable to man in the middle attacks
+
+Digital envelopes are an application of public key encryption which can be used to protect a symmetric key, which can be used to protect a message without needing to first arrange for sender and receiver to have the same secret key
+
+Randomness
+Two criteria are used to valid a sequence of random numbers:
+- Uniform Distribution: The distribution of the numbers should be uniform, that is the frequency of occurrence of each of the number should be approximately the same
+- Independence: No one value in the sequence can be inferred from the others
+
+Random vs Pseudorandom
+…
+