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- Using Java Programming Language (Java Socket /TCP Programming) Please make a simple messaging program that will allow users to send private messages to other users (not the server). All the users have their usernames and passwords stored in an XML file Users can only send messages to online users Messages to offline users will be stored in a separate XML fileEstablish 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?Computer Science C programming Develop a proxy HTTP server that can accept HTTP requests from clients and convert them to HTTPS request to the web server. The HTTP request can be filtered based on an access control list. The requests can be generated by any web client, such as the curl command or a web browser. the proxy converts plain text HTTP requests from a client to HTTPS requests and then returns the responses to the client. Main objective is to create a proxy HTTP server that converts cleartext HTTP requests from clients to HTTPS requests to servers and vice versa for the responsesresponses.
- 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…The system architecture as used in the above design is ? client/server, peer-to-peer, layered architecture. None of the above Describe the sequence of events captured in the diagram step-by-step. For each step, explicitly describe “Which object sends what message to which object” [the first step is provided as an example]. A user triggers the clickOnLink(v) operation on the webbrowser; [continue from here]3. Suppose that you have written a time server, which periodically notifies its clients of the current date and time. Write an interface that the server could use to enforce a particular protocol on its clients.
- Q.7. Design and implement a client/ Multi-threaded Server Chat application where a set of clients are able to send their request to the Multithreaded Server. In this application, messages that are exchanged between client and server, must be encrypted using AES encryption algorithm. After receiving the message, each party (client or server) perform decryption operation and show the content of message on the terminal.- Consider another carelessly written Web application, which uses a servlet that checks if there was an active session, but does not check if the user is authorized to access that page, instead depending on the fact that a link to the page is shown only to authorized users. What is the risk with this scheme? (There was a real instance where applicants to a college admissions site could, after logging into the Web site, exploit this loophole and view information they were not authorized to see; the unauthorized access was however detected, and those who accessed the information were punished by being denied admission.)Tasks: Part A: Develop a UDP/IP server program in java that waits for clients to server. The server responds to the client with one of the following based on client’s request: Export secret key generated using KeyGenerator Export Text and Message Digest Export Text and Digital Signature Send original text for the encrypted text received from client Part B: Develop a UDP/IP client program that make request secret key, Message Digest, Digital Signature and original text by sending the encrypted text to server program developed (in Part A). This program will display the various objects received from server on its console.
- What type of authentication method is displayed in this picture? Multi-Factor Authentication Biometric Authentication Token-based authentication Single Sign-on 2.Wendy is examining the logs of a web server that was compromised by a remote attacker. She notices that right before the attack, the logs show a series of segmentation fault errors. Other logs indicate that the attacker sent very long input strings to the web server that had malicious commands at the end of the string. What type of attack most likely took place? SQL Injection Cross-site request forgery Cross-Site scripting Buffer Overflow 3.Jessica is combatting a security incident where a specific piece of malware is continually infecting systems on her network. She would like to use application control technology to block this file. What type of application control should she use? Greylisting Bluelisting Whitelisting BlacklistingIn the BitTorrent P2P file distribution protocol, the seed breaks the file into blocks, and the peers redistribute the blocks to each other. Without any protection, an attacker can easily wreak havoc in a torrent by masquerading as a benevolent peer and sending bogus blocks to a small subset of peers in the torrent. These unsuspecting peers then redistribute the bogus blocks to other peers, which in turn redistribute the bogus blocks to even more peers. Thus, it is critical for BitTorrent to have a mechanism that allows a peer to verify the integrity of a block, so that it doesn’t redistribute bogus blocks. Assume that when a peer joins a torrent, it initially gets a .torrent file from a fully trusted source. Describe a simple scheme that allows peers to verify the integrity of blocks.Write the python code in the space provided to create a UDP server, that reads a message and sends a response
