Question 1 Discuss various methods for distribution of public keys in public cryptographic systems. Explain the pros and cons of each method. Question 2 How does one sign a message and what is the...

Distribution Keys
Distribution Keys
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Contents
Question 1    2
Question 2    2

Question 3    3
Question 4    3
References    5
Question 1
· RSA approach: Based upon mathematics that it is easier to multiply two large prime numbers but it’s very difficult to find its factor.
· Publicly available directory: Participants can easily replace key at any time and one of the cons is that it is still vulnerable, trusted party can be attacked.
· Public key authority: Participants can request for their keys in an encrypted manner that can be decrypted by the private key of the authority. It also has one big disadvantage that danger of tempering with authority is still prevailing (Belim and Bogachenko, 2016).
· Public key certificate: Digitally signed electronic certificates are used by the participants to exchange public keys safely. It also has some authentication issues.
Question 2
In modern email programs support digital signatures use as well as digital certificates, so it's very easy to sign any type of outgoing email and verify digitally signed incoming mail. Digital signatures likewise widely used to provide evidence...