LINUX+ AND LPIC-1 GDE.TO LINUX CERTIF.
5th Edition
ISBN: 9781337569798
Author: ECKERT
Publisher: CENGAGE L
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In the case of public key encryption, if you use both the signature and encryption features, which key will you use for encryption and which for signing?
What is the difference between hashing passwords saved in a file and saving them in a password database that is encrypted?
Authorization lists need to be encrypted and secured since they are so vulnerable to manipulation. Suppose these files were accidently changed; what would happen?
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- What is the difference between hashing passwords stored in a file and saving them in a password database that is encrypted?arrow_forwardAssume that you want to make the message available to the users who are authorized to read the respective message. Each message contains some confidential data; therefore, instead of sending the plain text to each user, you decided to encrypt each message using secret key encryption and make the encrypted messages available for read. You need to distribute the encryption keys with the encryption methods to the authorized users. The communication channel between the users and the website is insecure; however, the pubic keys of the users are encrypted through double encryption methods for 2-layer of authentication mechanism and convert into cipher text as follows. The following cipher message was produced using the Rail Fence algorithm with 3 rails: “WECRLTEERDSOEEFEAOCAIVDEN” What is the corresponding plain text?What’s wrong with the shift cipher? Provide any three reasons.arrow_forwardHow exactly will authentication help us do what we set out to do? In this part, we'll talk about the pros and cons of some of the different login methods that are available right now.arrow_forward
- It is often claimed that passwords do not get saved as plaintext anywhere in systems, and even the system administrator does not know your password. Given what you learned about hash functions. Explain how such a claim is possible. In other words, how do systems perform authentication without having to store passwords in a format that can be read by the system administrators. Authentication is primarily the process of verifying that provided password is correct. Design a simple authentication system and implement the following two methods: def signup(username, password '''store the user credential so that the system knows how to authenticate the user in the future (when login() gets called).'''def login(username, password): '''returns True, if the provided username and password are correct'''arrow_forwardConsider yourself the manager of a completely imaginary bank account. Discover many forms of authentication. Is it true that passphrases have become obsolete?arrow_forwardProvide an example of when it might be necessary to keep a false login active. In other words, you should be familiar with a wide variety of authentication methods. Are passphrases becoming obsolete?arrow_forward
- It is not the same thing as having an encrypted password database on your computer if you have a file where you keep hashed passwords, but what exactly is the difference between the two?arrow_forwardWhich manner of operation is vulnerable to the following security flaw: block independence allows an attacker to successfully alter some ciphertext blocks without knowing the key used?arrow_forwardTo solve the following issue, you must first identify the vulnerabilities in each authentication technique.Passwords are validated by Bob by first hashing them and then looking them up in a database of hashes.Bob uses a hashing method to verify a password against a list of previously hashed passwords.arrow_forward
- Explain the threat in each of the following types of authentication and provide a solution for each scenario below: Alice sends a password, and Bob compares it against a database of passwords. Alice (the sender) converts her message into a hash value and encrypts the hash value using her private key. This encrypted hash value is the digital signature.arrow_forwardSalt enhances the difficulty of guessing in the UNIX login authentication procedure by a factor of ten. The salt, on the other hand, is saved in the same file as plaintext, in the same entry as the hashed password. As a result, if an attacker has knowledge of the salt and hashed password from the password file, the password does not need to be guessed. Why is it claimed that salt boosts security?arrow_forwardAuthorization lists should be encrypted and secured since they are so vulnerable to manipulation. Imagine if someone messed with these files without meaning to.arrow_forward
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LINUX+ AND LPIC-1 GDE.TO LINUX CERTIF.Computer ScienceISBN:9781337569798Author:ECKERTPublisher:CENGAGE L
LINUX+ AND LPIC-1 GDE.TO LINUX CERTIF.
Computer Science
ISBN:9781337569798
Author:ECKERT
Publisher:CENGAGE L