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- Carlo and Reyna are couples. Out of suspicion that Carlo is flirting with another girl, Reyna asked for the Facebook username and password of Carlo so that she can ascertain that Carlo has no other woman. Carlo refused to give his username and password to Reyna. Other than Carlo, Carlo’s sister also knows his brother’s Facebook username and password. Carlo’s sister is Reyna’ best friend. Reyna imposed that if Carlo still refuses to give her his Facebook credential, she would break up with him. Lawfully speaking, can Reyna imposed that Carlo give her his Facebook username and password? a. Yes, because it is the right of Reyna to ascertain that Carlo doesn’t have any other woman. b. Yes, because by going into a relationship with Reyna, Carlo waives his right to privacy over his Facebook account. c. No, because they are not married yet so they are still entitled to privacy over their social media accounts. d. No, because Carlo still enjoys a right to privacy over his…One of the problems with the Internet email system is that sending forged emails is relatively straightforward, i.e., it is easy to send an email with a fake sender/from address. One solution to this problem would be for a domain’s mail servers to digitally sign any email originating from the domain. For this to be useful, the public key would need to be made available to clients to validate the signatures. It is proposed that the public keys of the mail servers will be verified and signed by a certification authority (same as SSL/TLS certificates) and distributed via a standardised URL for the domain, e.g., https://mybusiness.com/email.pubkey. (a) Explain how the client would obtain the public key and validate the email server’s digital signatures. (b) Discuss the problem of trusting the obtained public key and how this solution results in public keys that can/cannot be trusted. (c) Indicate whether you believe this approach could be used to prevent forged emails and explain why it…A cipher suite is a choice of algorithms for key exchange, authentication and encryption to be used together in TLS. Cipher suites are specified by an abbreviation such as the following: “ADH-DES-CBC-SHA”. Search online and find one example of a cipher suite used in TLS 1.3. Write the name of the cipher suite; then, for each component, write what the abbreviation stands for and for which cryptographic task that algorithm is used in that suite.
- Design a cryptographic solution for implementing the dinning cryptographers protocol. You should consider the following: The secret messages shared between any two agents in the protocol are communicated over public channels only. The announcements made by each agent must be traceable in a trustworthy way to that agent. Your solution should be a new protocol that addresses the above two requirements.Carlo and Reyna are couples. Out of suspicion that Carlo is flirting with another girl, Reyna asked for the Facebook username and password of Carlo so that she can ascertain that Carlo has no other woman. Carlo refused to give his username and password to Reyna. Other than Carlo, Carlo’s sister also knows his brother’s Facebook username and password. Carlo’s sister is Reyna’ best friend. Reyna imposed that if Carlo still refuses to give her his Facebook credential, she would break up with him. What if Carlo’s sister gave Reyna Carlo’s Facebook username and password without his consent? Can Carlo sue her sister for breach of privacy? a. Yes. Since Carlo did not give his consent to her sister to give to other people his facebook username and password, he still enjoys privacy over his account. b. None of the above. c. No, because Carlo’s sister doesn’t know it’s a crime to give to other people his brother’s Facebook username and password. d. No, because as a rule…Computer science Use C language to solve the question. The initial server and client .c code is given write code using these .c client and server files. Q1: Design a client-server model for two-way communication. Both the client and server should beable to send and receive messages.Upon the establishment of successful connection, the server should send a message, “Hi, youhave connected to the server!”.[The client should then send a string to the server. The server should reverse the string andsend it back to the client. The client should then display the received string.] This job will bedone in a loop of 5 times. -------------------------------------------- server.c #include <stdio.h> #include <stdlib.h> #include <sys/socket.h> #include <sys/types.h> #include <netinet/in.h> int main() { char server_message[256] = "Hi, Yes you have reached the server!"; char buf[200]; // create the server socket int server_socket; server_socket = socket(AF_INET,…
- 1)In a social network, what access rights would you give to friends?What access rights would you give to the friends of your friends? How would your policy depend on the length of such a recommendation chain? 2)You are given a set of categories. Implement a lattice-based need-to-withhold policy where you selectively withdraw access rights from subjects.Can someone help me with the following, it's revision for an exam I'm doing. If your explaining it could you please provide detailed steps of why you did what you did so I know how to do it if it comes up in the real thing! Thank you so much! :) An IT administrator is interested in studying server traffic. He believes that the time (inminutes) between requests being sent to a server can be well modelled using a Weibulldistribution with parameters α = 2 and β = 1 b) The median arrival time is defined to be the time for which the probability of beingless than this value is 0.5. Calculate the median time between requestsBob has designed a secure login system for the student portal of the Xiamen University of Technology (XUT). In Bob's design, a two-factor authentication method is used for verifying the authenticity of the user. A brief description of the design is provided below. For the two-factor authentication, the followings are required: • Factor 1: a user first required to provide a secret password, • Factor 2: the user then needs to provide the correct answer to a security question. To securely store the user password in the system, Bob has used state-of-the-art encryption algorithm, Advanced Encryption Standard (AES), to encrypt the user password and stored the encrypted password in the system database. For securely signing in to the system: the user needs to provide his/her user ID and the corresponding password. This information will be transmitted to the system over a secure communication channel. Upon receiving this information, the system will: o locate/retrieve the corresponding…
- Establish a list of DNS records, classifying each one according to the kind of record it includes, and then arrange this list. Examples of each of them, along with an explanation of why it is advisable to make use of them, have been provided for your perusal. Do you feel it is feasible to have a web server and a mail server both use the same name at the same time?Q: Alice wants to set up a business company that securely deals with her clients. Bob is a potential client that Alice wants to have a good connection. As a security consultant, your job is to devise a plan to establish a secure information exchange. The assumption is made that Alice and Bob already have their public and public keys; (PrivA, PubA) and (PrivB, PubB) respectively, and both of them have exchanged their public key beforehand. Your plan includes comprehensive protocols to secure all messages, according to Alice’s requirements below. Discuss your answers. i) Integrity: Alice and Bob want to make sure that every message sent cannot be forged by anyone. ii) Authenticity: Alice and Bob can verify that messages actually came from them. iii) Confidentiality: Alice exchanges business-related documents with Bob in a way, so that Alice and Bob may open, read or modify the documents.Q: Alice wants to set up a business company that securely deals with her clients. Bob is a potential client that Alice wants to have a good connection. As a security consultant, your job is to devise a plan to establish a secure information exchange. The assumption is made that Alice and Bob already have their public and public keys; (PrivA, PubA) and (PrivB, PubB) respectively, and both of them have exchanged their public key beforehand. Your plan includes comprehensive protocols to secure all messages, according to Alice’s requirements below. Discuss your answers based on Asymmetric Encryption. i) Integrity: Alice and Bob want to make sure that every message sent cannot be forged by anyone. ii) Authenticity: Alice and Bob can verify that messages actually came from them. iii) Confidentiality: Alice exchanges business-related documents with Bob in a way, so that Alice and Bob may open, read or modify the documents.