Dana has registered her public key Kp with the certificate authority CA, whose public key is Kca. She wishes to send a message m to Earl, who does not know Dana and does not recognize the authority of CA. Fortunately, Dana knows Earl's good friend Finn, who does recognize CA's authority. Furthermore, both Earl and Finn work at Gaggle and have registered their public keys (Ke and KF, respectively) with the company's certificate authority, the public key for Gaggle's certificate authority is KG (Note that both Earl and Finn have access to Gaggle certificates, but they have never exchanged their public keys with one another before.) Dana signs her message using her private key, and sends it to Finn. She asks Finn to forward it to Earl, which Finn does as follows: • Finn uses his private key to sign Dana's signed message, and sends the result to Earl.
• Finn also gets a copy of Dana's public-key certificate, and signs and sends that to Earl
• Finn signs a message that indicates what CA's public key is, and sends that to Earl. . Finally, Finn signs and sends to Earl a message stating his confidence in CA's jurisdiction over Dana's public key.
a. Express in the access-control logic the four items that Finn sends to Earl.
b. Identify the additional certificates, recognitions of authority, and any other trust assumptions that Earl requires in order to deduce that the message m truly came from Dana. You should express each of these items in the access control logic.
c. Give a formal proof that m can be deduced from your answers to parts (a) and (b).
d. In your opinion, which if any of the assumptions from part (b) are the most suspect? Explain your answer.

d) in the state of iowa

b. florence

d. milan

1.which of the following was the significance of the emergence of a vernacular language in medieval europe?

answer: it suggested a new interest in ordinary people

2.which of the following was a central idea in thomas aquinas's suma theologica?

answer: faith and reason don't contradict each other

3.which of the following did gothic architecture reflect about the late middle ages?

answer: the church had great wealth and authority

4.what examples of gothic architecture survive today?

answer: abbeys, cathedrals, universities

5.how did the byzantines most directly impact later civilizations?

answer: by preserving ancienct sources of knowledge and information

6.which of the following was the impact on europe of the disease described?

answer : 1/3 of the population of europe died, production declined, and cost of labor soared

7.which pair of answers best completes the top and middle arrows in the chart?

answer: the bubonic plague severly reduced the population of europe; higher demand for labor increased wages and prices leading to a market economy

8.which order of contacts most likely traces the spread of the bubonic plague to medieval europe?

answer: conquering mongol armies in asia, rats in chinese cities, fleas with travelers to the middle east and europe

9.if you wrote an essay about medieval europe, in a paragraph about which topic would you most likely refer to avignon?

answer: papal rivalry

10.how did the second great schism lead to the end of medieval europe?

answer: it caused people to question the authority of the church

11.which pull factors attracted european jews to eastern europe during the late middle ages?

answer: jews were attracted to eastern europe because they could practice judaism there without persecution

12. why did the speaker call moscow the "third rome"?

answer: moscow was the center of expanding political power

13.which statement best summarizes the effect of geography on eastern europe?

answer: different parts of the region were most influenced by cultures that had easiest access to them

14.how did eastern europe become home to so many ethnic groups?

answer: its geography and location facilitated migration

15.what are two factors that probably isolate russia from western europe?

answer: the cyrillic alphabet and olga's selection of the byzantine church

hope this : ) make brainliest