A+ Guide to IT Technical Support (Hardware and Software) (MindTap Course List)
9th Edition
ISBN: 9781305266438
Author: Jean Andrews
Publisher: Cengage Learning
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Chapter 7, Problem 5TC
Explanation of Solution
Given:
Jack wants to email two documents to his friend.
The files are bounced back by an email server as they are very large in size.
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To find: The suggestion that can be given to Jack so that he is able to send the files to his friend...
Expert Solution & Answer
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Students have asked these similar questions
Between Full, Incremental, and Differential
A.) Which one backs up the things that have been changed or added since the Last Full Back Up?
B.) Which one backs up the things that have changed or added since any type of backup.
Both Microsoft Windows and Linux utilize several different encryption features. What type(s) of encryption features are best for your organization? Is it necessary to encrypt data at-rest, in-transit, or only under certain circumstances? Explain.
You must utilize cypher block chaining or cypher feedback mode if you need to transfer a really large file.If one is more effective, by what percentage is it better?
Chapter 7 Solutions
A+ Guide to IT Technical Support (Hardware and Software) (MindTap Course List)
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Similar questions
- When sending a large file, which method uses less encryption operations, cypher block chaining or cypher feedback mode?And which one is much more effective?arrow_forwardSuppose Alice and Bob store their RSA public keys in a file on a server. Theycommunicate regularly using authenticated and confidential messages. Eve wants to readthe messages but is unable to crack the RSA private keys of Alice and Bob. However, Eve canbreak into the server and alter the file containing Alice’s and Bob’s public keys.a. How should Eve alter that file so that she can read confidential messages sent fromBob to Alice?b. How might Alice and/or Bob detect Eve’s subversion of the public keys?arrow_forwardQ1) Which encryption method is better: stream cipher or block cipher and why?arrow_forward
- In practice, we do not usually sign a document by 'encrypting' (I'm using the word loosely, here) the entire document with our private key. Instead, we calculate a digest over the entire document, and then 'encrypt' the digest. Why? Select one: a. It prevents message recovery b. The digest also provides message integrity c. It is faster d. It avoids having to raise an incredibly large number (the entire document) to a massive powerarrow_forwardNo written by hand solution Encrypt the plans.txt file using the password pinky and save the output to /opt/book/encryption/secret-key/plans.aes. h. Provide a screenshot of the output in terminal and a screenshot of the contents of the folder opt/book/encryption/secret-key /. Commands to be used: • cd /opt/book/encryption/secret-key • aescrypt -e plans.txt -p pinky -o plans.aes i. Explain what type of encryption aes is, and what is the main difference between aes and RSA encryption algorithmarrow_forwarda. Which of the following can be used for both encryption and digital signatures? 3DES AES RSA MD5 b. Digital Signatures provide which of the following? Confidentiality Authorization Integrity Authentication Availability c. The difference between a hash and a digital signature is: Hashes are used to verify message authenticity, digital signatures are used to verify message integrity. Hashes are used to verify message integrity and authenticity, digital signatures are used to verify message authenticity only. Hashes are used to verify the message integrity only, digital signatures are used to verify message authenticity and message integrity. There is no functional difference. d.Which asymmetric algorithm is used for establishing a shared key?A.Elliptic CurveB. PGPC. Diffie-HellmanD. RSA e.What is used to create a message digest that will be attached to data at rest or in transit? Asymmetric algorithm Symmetric algorithm Encryption Hashing Non-repudiation Authentication…arrow_forward
- Answer the following which is true false Hard links must be located on the same filesystem as the target, while symbolic links do not have to be located on the same filesystem as the target. Is this true or false?arrow_forwardSuppose Alice and Bob have RSA public keys in a file on a server. They communicate regularly using authenticated, confidential messages. Eve wants to read the messages but is unable to crack the RSA private keys of Alice and Bob. However, she is able to break into the server and alter the file containing Alice's and Bob's public keys. How should Eve alter that file so that she can read confidential messages sent between Alice and Bob, and forge messages from either? How might Alice and/or Bob detect Eve's subversion of the public keys?arrow_forwardGiven the following: A block cipher ?(?, ?) that takes a 32-bit plaintext block ?? and a 32-bit key ? and generates a 32-bit ciphertext ?? = (?? ⋘ 4) ⊕ ?. A 32-bit key ? = ????????. A constant ? = ??. Answer the following questions about CMAC. What is the value of ?1, the first generated key? What is the value of ?2, the second generated key? What is the authentication tag generated for the 8-byte message ? = ????????????????? What is the authentication tag generated for the 6-byte message ? = ?????????????arrow_forward
- An underground resistance group wants to write articles with completely differ- ent security goals. The resistance group shared a secret at the last resistance meeting that they can all use for these articles. Here are their goals: Only users with the shared secret should be able to upload to the server. Only users with the shared secret should be able to read the articles. Any changes to the article should still be easily detectable The resistance is paranoid about both quantum computers and any mod- ern encryption algorithms so they want to avoid public key cryptography. They only trust AES (symmetric key encryption) and SHA-256 (crypto- graphic hashing) since these have been around for decades and are resistant to quantum computers. Write a protocol for the underground paper to authenticate authors before publishing to the server. (HINT: Make sure that this protocol cannot be tricked by someone who has been listening to the previous article upload) Write a protocol for the server…arrow_forwardwhat type of log file is shown in this figure? -SYSTEM -FIREWALL -APPLICATION -WEB SERVERarrow_forwardAhmed and one of his close friend, Ali, used to send e-mail using public and private key encryption. He can send e-mail to Ali using the following two methods: He encrypts an e-mail with Ali’s public key and decrypts it with his own private key. He encrypts an e-mail with his own private key and Ali decrypts it with his public key. Briefly describe and suggest a method of using public and private key encryption which would be better than first and Second method for allowing Ali to read e-mail sent by Ahmed.arrow_forward
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