A school is upgrading its website and will require students to create a password to access their marks online. In order to create secure passwords, students will be required to meet certain conditions. a. Determine the total number of possible 4-character passwords that can be created using each of the following requirements: the digits 0 to 9, where the first digit must be even and last digit must be odd, and where digits can be repeated

Q: Design a direct file organization using a hash function, to store an item file with item number as…

A: A hash function is a mathematical function that takes in an input (such as a string or a number) and…

Q: What is the difference between avoiding deadlock and preventing deadlock?

A: INTRODUCTION: A deadlock occurs when two computer programmes that share the same resource…

Q: Her public key certificate is valid from 1000 hours on the 9th November 2013 to 1000 hours on the…

A: For a variety of reasons, a certificate may be revoked (which we'll go over in more depth in the…

Q: ve created a BST inserting keys 18, 56, 28, 40, 35, 38, 36, 20, and 24 in that order into an…

A: Hey there, I am writing the required solution of the above stated question.Please do find the…

Q: question 6: If all locking operations, both read locks and write locks, are completed before the…

A: In the context of database management, a locking action is the process used to limit access to a…

Q: Computer Science Based on Java specifically, in computer science answer each part of the question…

A: Each part of the question is answered below:

Q: Q5) Find the result of Z at the last command for the following groups: Group I X= [1 3579]: Y= [2 4…

A: Answer: We need to find the result Z so we have written code in MATALB and we have shown output of…

Q: Now lets consider designing a database for the a car lot. Consider the following statements -> Our…

A:

Q: Question 2. Consider the following access control scenarios:(a). Let Alice, Bob, and Darth be three…

A: In the given scenario:1. Alice owns directory D with permissions set to 1777.2. Bob creates a file F…

Q: How would you use a combination of public key encryption and secret key encryption to communicate…

A: Public key cryptography is also called Asymmetric key encryption which uses two types of keys to…

Q: Explain d llasii which identifies the files that may be infected by viruses.

A: we have to explain how has algorithm helps us to identifies the files which is infected by viruses.

Q: Design a direct file organization using a hash function, to store an item file with item number as…

A: A hash function is a mathematical function that takes in an input (such as a string or a number) and…

Q: Determine the dangers of the various authentication techniques and provide a solution to the…

A: Passwords can be stolen: If an attacker gains access to the database of double-hashed passwords,…

Q: assume you have 50 to 100 employees whose ids are in the rage of 1000 to 1099, and you have a file…

A: Here is complete solution explained

Q: lem 7 Explain one security problem with each of the following code snippets and suggest a defense to…

A: Security Problem in #1: SQL Injection Attack:Defense: Use prepared statements to ensure that user…

Q: a) Create a PHP based web authentication. A form that will get username and password as input data.…

A: here we write code using pho with sql:…

Q: What is the most likely candidate condition that must be eliminated to prevent deadlock? Mutual…

A: Deadlock Prevention

Q: Convert the given NFA to DFA 8€ →P 9 *r b {p,r} Ø 0 a {q} {p} 0 {p, q} {r} {p}

A: In the given NFA, Set of states= {p, q, r} Set of input alphabets= {a, b} Start state= p Final…

Q: Consider a server that has 20 users, each of which has 50 files in their home directory. Each user…

A: Directory and file permissions on UNIX or Linux machines are set and can be changed by the user.…

Q: 6. A program called Isu [3] gives access to role accounts. The user's access rights are checked, and…

A: The principle involved that allowed Mary to enter the password is the principle of psychological…

Q: We discussed fixed and one-time passwords as two extremes. What about frequently changed passwords?…

A: One security tip for computer users is to constantly change your passwords to something new, but it…

Q: A password is 4 characters in length,

A: Given condition: We need to choose among:

Q: Q: Suppose you were asked to develop a distributed application that would allow teachers to set up…

A: It should go without saying that students should not have access to exams early to a certain period.…

Q: Why are access restrictions important today? Please include two access restrictions in your…

A: Introduction: The term "access control" refers to a set of security measures that restrict what and…

Q: Consider a two-class case with classes fraudulent and nonfraudulent. A data mining routine has been…

A: Given: 50 records as fraudulent (30 correctly so) and 950 as nonfraudulent (920 correctly so)

Q: Specify the dangers that are connected to each type of authentication, and then provide a solution.…

A: The comparison of hashed passwords and double-hashed passwords highlights the risks and mitigation…

Q: What is the importance of access controls? Provide at least two examples of access controls.

A: importance of access controls 1)access control is important because it is a valuable security…

Q: Explain the requirements on both the sender side and the receiver side that will ensure both the…

A: Solution 1) Let's see what are the requirements needed on both the sender side and the receiver side…

Q: Consider the following lock requests as given below. S1(A),S2(B),X3(A),X2(C),S1(B),S1(C),X2(B)…

A: Given lock requests are: S1(A), S2(B), X3(A), X2(C), S1(C), X2(B) S() represents shared lock and…

Q: urrogate keys) for primary keys (such as Student_id) because they are artificial. Can you propose…

A: The question is solved in step2

Q: 33. Lamport's one-time password scheme users the passwords in reverse order. Would it not be simpler…

A: First of all let's understand the mechanism of lamport's OTP mechanism.  It use the transforming…

Q: Question 2:  One type of the modern encryption systems is the block encryption. Using your own…

A: a) There are several data encryption approaches available to choose from. Most internet security…

Q: Consider a two-class case with classes fraudulent and nonfraudulent. A data mining routine has been…

A: Consider a two-class case with classes fraudulent and nonfraudulent.  Calculate the overall error…