Suppose in a wireless communication network transmitter Alice wants to send some confidential information to receiver BOB. The EVE is there to hear (confidential information) what is being communicate between Alice and BOB. In this case what types of security you will propose (From OSI layers) as a network engineer. Explain your proposed method/s and justify your answer.

Suppose in a wireless communication network transmitter Alice wants to send some confidential information to receiver BOB. The EVE is there to hear (confidential information) what is being communicate between Alice and BOB. In this case what types of security you will propose (From OSI layers) as a network engineer. Explain your proposed method/s and justify your answer.

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

See similar textbooks

Similar questions

A. We have decided to change the type of hashing we use to a newer version that is collision resistant. What happens when a hash collision occurs? You can figure out the plain text from the hash. When two different plaintexts produce the same hash. The same plain text produces two different hashes using the same hash function. A variable-length text produces a fixed-length hash. B.“Alice” and “Bob” are talking about hashing and they use the abbreviation MAC. What are they talking about? Message Authentication Code. Media Access Control. Mandatory Access Control. Message Access Code. C.Which one of the following is not one of the basic requirements for a cryptographic hash function? The function must be collision free. The function must work on fixed-length input. The function must be relatively easy to compute for any input. The function must be one way. D.Bob wants to produce a message digest of a 2,048-byte message he plans to send to Alice. If he uses the SHA-1 hashing…
B has just received the following message, which represents a cryptographic data object:{({(KPbB)KPrS mod KPbS}K1,{|(NB, NA, {{({K2}KPbB, NS)}(G1)KPrA mod NA}K1, {|{({G3}(KPbA)KPrS mod KPbS, G2)}K1|}KPrB)|}KPrA)}KBSThe following explains various terms in this object and some of the abbreviations used:• {M}K represents the encryption of some message/data M using the key K• {|M|}K represents the digital signing of some message/data M using the key K• NX represents a nonce (i.e. a fresh and possibly random number used once only) generated by X• KpbX represents the public part of the key pair presumably owned by X• KprX represents the private part of the key pair presumably owned by X• KAB represents a symmetric key shared between A and B• K (or K1, K2, K3 etc.) represents some arbitrary key with no assumptions about its scope• M represents some alphanumeric/textual message with no assumptions• G1, G2, G3 etc. are prime numberswhich of the following sets of keys, nonces, numbers, and…
You find out that your University is using an authenticated messaging system that is vulnerable to a length extension attack, because it uses an iterative hash function with the insecure MAC construction t = h(K || m). By eavesdropping on the network you intercept the following message m from your professor to the administration: “Set final course grade to A for J. Smith,” along with its tag t. Give an example of a believable message that you could forge and send using a length-extension attack, and describe how the attack would work. Specify how you would use the hash function and what pieces of data you would send.
Defanging an IP Address • Given a valid (IPv4) IP address, a defanged IP address replaces every period “.” with “[.]”. • Example: address = “255.100.50.0”, defanged = “255[.]100[.]50[.]0” • Write a function that accepts a string as input (valid IP address) and returns the defanged IP address. • Test the function in the main method. Sample output at the bottom. • Have the expected defanged address hardcoded and compare it to result from the function
We know that a digital signature is for the purpose of ensuring data integrity and authenticity. a) Checksum adds all the bits of the message (or blocks), is checksum a good way to construct a digital signature scheme? How about a hash function, i.e, Sign(M)= h(M)?b) If we use a hash to generate a signature in a more complicated way as follows Sign(k,m) = σ = h(k) XOR m XOR h(m), and m, σ will be sent along. Would this be a secure signature? Briefly explain. please do not use chegg or ai tool like chat gpt please
Cryptographic Data ObjectsB has just received the following message, which represents a cryptographic data object:{({(KPbB)KPrS mod KPbS}K1,{|(NB, NA, {{({K2}KPbB, NS)}(G1)KPrA mod NA}K1, {|{({G3}(KPbA)KPrS mod KPbS, G2)}K1|}KPrB)|}KPrA)}KBSThe following explains various terms in this object and some of the abbreviations used:• {M}K represents the encryption of some message/data M using the key K• {|M|}K represents the digital signing of some message/data M using the key K• NX represents a nonce (i.e. a fresh and possibly random number used once only) generatedby X• KpbX represents the public part of the key pair presumably owned by X• KprX represents the private part of the key pair presumably owned by X• KAB represents a symmetric key shared between A and B• K (or K1, K2, K3 etc.) represents some arbitrary key with no assumptions about its scope• M represents some alphanumeric/textual message with no assumptions• G1, G2, G3 etc. are prime numbersWhich of the following sets of keys,…
Alice sets up an RSA public/private key, but instead of using two primes, she chooses three primes p, q, and r and she uses n=pqr as her RSA-style modulus. She chooses an encryption exponent e and calculates a decryption exponent d. Encryption and Decryption are defined: C ≡ me mod n and m ≡ Cd mod n where C is the ciphertext corresponding to the message m. Decryption: de ≡ 1 mod φ(n) | Let p = 5, q = 7, r = 3, e = 11, and the decryption exponent d = -13. n = 105 & φ(n) = 48 Q: Alice upgrades to three primes that are each 200 digits long. How many digits does n have?
Suppose Alice used a Hash function HA to encrypted her sensitive data. Everyone in the public can access her encrypted data. Group of answer choices She must keep HA secret and should not share it with others. She can share HA with other users. She must keep HA secret but can share it with others after encryption. None of the above.
Substitution Cipher is an old technique that substitutes one thing for another. For example, alphabet messages can be ciphered by applying the following substitution. plaintext: abcdefghijklmnopqrstuvwxyz | | V Vciphertext: mnbvcxzasdfghjklpoiuytrewq However, this type of ciphering produces patterns since the same plaintext strings produce the same cipher text. Polyalphabetic Cipher, on the other hand mitigates this problem as plaintext characters are not always replaced with the same cipher text character. The replacement of each character dependson a key as well as on the position of the character in the text; for example, by using a formula such as: for (int i=0; i < length of P; i++) C[i] = P[i] + K + (i mod 3) In essence, if the key, K, is choses as K=10, then 10 is added to characters in position 0, 3, 6, …; and 11 is added for those in…
Suppose your RSA public key is PK: {n, e} = {13861, 37}. Your friend sends you a ciphertext C = 9908. But unfortunately you have forgotten your private key, now you have to crack it yourself.a) Write down a possible condition of factors p and q.p= q=b) What is your private key SK: {d}?d=c) What is the plaintext of your friend’s message?The plaintext M =d) Suppose the plaintext M is a 12-digit number consisting of a prefix “19” and 1234567890. What is the corresponding ciphertext? Since M is greater than n, you only need to encrypt four digits at a time. Ignore redundant zeros. e.g., 0001 = 1. The result should contain three integers.The ciphertext C0 =
For the following question, use the mapping given in the table. A B C D E F G H I J S Z D U F R B K L M K L M N O P Q R S T J V G N A Q O Y W I U V W Z Y Z E C T H P X Encrypt the following: Pure calculation is, in its way, the poetry of logical way of thinking. Decrypt the message with shift of 3. Open WindowDecrypt the message with shift of 25. Open
Give expanded answers/arguments to the following (i.e. not just a Yes or No). It would also strengthen your argument if you have at least one reference: If I am not using my network, why can’t others (probably neighbours) use it occasionally?