Question

D Question 18 4 pts Which of the following statements is incorrect about Management of Public Keys? • public-key cryptography makes it possible for people who do not share a common key in advance to communicate securely; if Alice and Bob do not know each other and Alice wants to obtain Bob's public key, he can simply post it on his web site an organization that certifies public keys is called a Certification Authority (CA), it issues aj certificate after it verifies the identity of the principal individual, company, etc.); the certificate contains the principal's public key and identifying information, signed by the CA X.509 is a standard for certificates used on the Internet, the Public Key Infrastructure (PKI) involves a hierarchy of CAs, for example: the root CA certifies the Regional Authorities (RAs), which may have local CAs under them; that is necessary because a single CA cannot handle the load of the entire Internet, Question 19 5 pts What does Authentication involve? authentication is the technique by which a process verifies that its communication partner is who it is supposed to be (and not an imposer), authentication involves what the process is permitted to do, for example: what files or data it has access to authentication with a shared secret key involves 7 steps, where the shared key is sent through the network securely authentication with Kerberos is based on the model of three headed dog from the Greek mythology, where each head involves 3 steps

Answer 1

Here I am providing the answer for the above questions:

1.

the public key infrastructure(PKI) involves a hierachy of CAs,for example:the root CA certifies the Regional Authorities(RAs),which may have local CAs under them;that is necessary because a single CA cannot handle the load of the entire Internet.

2.

a) Authentication is a technique by which a process verifies that its communication partner is who it is supposed to be(and not an imposer)

d) authentication with Kerberos is based on the model of three headed dog from the Greek mythology,Where each head involved 3 steps.

Hoping that the above answers will help you...Thank you..