EBK COMPUTER NETWORKING
7th Edition
ISBN: 8220102955479
Author: Ross
Publisher: PEARSON
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Chapter 8, Problem R14RQ
Program Plan Intro
Public Key:
The key that uses asymmetric-key encryption
Hash Function:
Any function that can be used to map data of arbitrary size to data of a fixed size is called a hash function.
Hash functions provide message integrity as it is computationally infeasible to find any two messages with the same hash.
Digital Signature:
Public-key primitives of message authentication are called digital signatures.
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Students have asked these similar questions
1)Alice wants to make a purchase from Etailer.com, an online retail store. She notices that her web browser received a copy of Etailer.com's X.509 certificate, which contains Etailer.com's public key. Alice notices that the certificate also includes an RSA signature from a certificate authority(CA).
a) how can alice be sure that the public key listed on the certificate really belongs to Etailer.com? be specific
b) what would be the security impact if a CA was compromised in some manner? be specific
c)why can Alice rely on the CA to validate Etailer.com's certificate? be specific
Suppose certifier.com creates a certificate for foo.com. Typically, the entire certificate would be encrypted with certifier.com's public key. True or False
Translate the following text describing a simple digitally-signed certificate into a formula.“Bob’s public key pkB is concatenated with the string ‘Bob, Inc.’ and the date string ‘2023-08-19’. The resulting string is hashed, and the result is encrypted with the certificate authority’s secret key skCA to produce signature s.”
Chapter 8 Solutions
EBK COMPUTER NETWORKING
Ch. 8 - Prob. R1RQCh. 8 - Prob. R2RQCh. 8 - Prob. R3RQCh. 8 - Prob. R4RQCh. 8 - Prob. R5RQCh. 8 - Prob. R6RQCh. 8 - Prob. R7RQCh. 8 - Prob. R8RQCh. 8 - Prob. R9RQCh. 8 - Prob. R10RQ
Ch. 8 - Prob. R11RQCh. 8 - Prob. R12RQCh. 8 - Prob. R13RQCh. 8 - Prob. R14RQCh. 8 - Prob. R15RQCh. 8 - Prob. R16RQCh. 8 - Prob. R17RQCh. 8 - Prob. R18RQCh. 8 - Prob. R19RQCh. 8 - Prob. R20RQCh. 8 - Prob. R21RQCh. 8 - Prob. R22RQCh. 8 - Prob. R23RQCh. 8 - Prob. R24RQCh. 8 - Prob. R25RQCh. 8 - Prob. R26RQCh. 8 - Prob. R27RQCh. 8 - Prob. R28RQCh. 8 - Prob. R29RQCh. 8 - Prob. R30RQCh. 8 - Prob. R31RQCh. 8 - Prob. R32RQCh. 8 - Prob. R33RQCh. 8 - Prob. P1PCh. 8 - Prob. P2PCh. 8 - Prob. P3PCh. 8 - Prob. P4PCh. 8 - Prob. P5PCh. 8 - Prob. P6PCh. 8 - Prob. P8PCh. 8 - Prob. P12PCh. 8 - Prob. P13PCh. 8 - Prob. P14PCh. 8 - Prob. P18PCh. 8 - Prob. P20PCh. 8 - Prob. P21PCh. 8 - Prob. P22PCh. 8 - Prob. P23P
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- 7) When Alice initiates communication with the website foo.com, foo.com sends Alice the site’s certificate. Which of the following statements is true about this certificate? The certificate includes foo.com’s private key, signed by the CA’s public key. The certificate includes foo.com’s public key, signed by the Alice’s private key. The certificate include’s foo.com’s public key, signed by the CA’s private key. The certificate includes foo.com’s public key, signed by foo.com’s private key. 8) Suppose the private key for http://www.goldieswebstore.com has been compromised. Suppose the webmaster reissues the certificate but does not revoke the compromised one. Describe a feasible attack that the person who compromised the private key could carry out. 6) Suppose the website https://identityprovider.utulsa.edu sets a login cookie called auth-user with domain = .utulsa.edu and path = / after a user successfully logs into the system. Suppose that https://hacked.utulsa.edu falls…arrow_forwardIn a public-key system using RSA, you intercept the ciphertext C = 10 sent to a user whose public key is e = 5,n = 35. What is the plaintext M?arrow_forwardWhat is the difference between a message authentication code and a one-way hash function in Cryptography?arrow_forward
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