Homework Answers
1.
Bob has just installed GPG for his operating system. Verify the finger print is NOT a step that Bob must take to process her key.
Option 4
2.
Bob has just installed GPG for his operating system.
- His email address
- The email address of the message recipient
- A passphrase
- The subkey size
Option 5
3.
Non-repudiation: Implementing encryption to ensure that someone cannot deny the sending of a message establishes.
Option 3
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QUESTION 1 Bob has received Alice's public key. Which one of the following is NOT a...
Using RSA Implementation: 1. Alice's RSA public key is given by (e, n) = (59, 1189)....
Using RSA Implementation:
1. Alice's RSA public key is given by (e, n) = (59, 1189). = (a) Determine Alice's private key (d, n). (b) Bob sends his first message Mi 67 to Alice, encrypting it with RSA using Alice's public key. He obtains a cypher text Cị that gets forwarded to Alice. What is Cį? (c) Bob sends his second message M2 to Alice, encrypting it with RSA using Alice's public key. Eve, who was eavesdropping on the commu-...
O-8. (15 points) Bob's simple toy RSA eryptosystem has public key kyub(n, e) (65,5), where n =p,-...
o-8. (15 points) Bob's simple toy RSA eryptosystem has public key kyub(n, e) (65,5), where n =p,-5x13-65 and e-5. I. Describe the key pair generation procedure for Bob to generate his private key kor- d. With the above given parameters, use EEA to calculate d 2. Describe RSA encryption procedure that Alice uses to encrypt her plaintext message x to its above given parameters, what will be y? ciphertext y before sending the message to Bob. Suppose Alice's message x-...
Question 11 (1 point) Approximately how many different starting settings could be created from the Enigma...
Question 11 (1 point) Approximately how many different starting settings could be created from the Enigma machine's remarkably simple architecture. Question 11 options: 160 X 10 ^9 160 X 10^36 160 X 10^72 160 X 10^18 Question 12 (1 point) PGP uses a two-phase encryption approach to encrypt a message, and a second two-phase approach to decrypt a message. Alice wishes to send a message to Bob that will be confidential and also prove to Bob that Alice was the...
Q3: Suppose Bob wants to send an encrypted message to Alice. Which one of the followings...
Q3: Suppose Bob wants to send an encrypted message to Alice. Which one of the followings is correct? 1. Bob uses a shared secret key to encrypt the message. Alice uses Bob's public key to decrypt the encrypted message. 2. Bob uses Alice's private key to encrypt the message. Alice uses a shared secret key to decrypt the encrypted message. 3. Bob uses Alice's public key to encrypt the message digest. Alice uses Bob's public key to decrypt the encrypted...
1. Something you know (SYK) Something you have (SYH) Something you are (SYA) Something you do...
1. Something you know (SYK) Something you have (SYH) Something you are (SYA) Something you do (SYD) are attributes that allow you to do what to a user? ___________ 2. Consider the primitive case of asymmetric encryption; no digital signature and no digital envelope. A person sends a message to a recipient using asymmetric encryption. What is the total number of keys used to send and receive the single message? _________________ 3. If the sender of a message encrypts the...
Question 4 (5 points) Consider the following scenario: Alice wants to send Bill a message. Alice...
Question 4 (5 points)
Consider the following scenario: Alice wants to send Bill a
message. Alice encrypts some information using Bill's public key;
Bill decrypts the ciphertext using his private key. This is an
example of:
Question 4 options:
1)
symmetric encryption
2)
digital certificate
3)
asymmetric encryption
4)
digital signature
Question 2: You are Alice. Bob publishes his ElGamal public key (q, a, ya) = (101,...
Question 2: You are Alice. Bob publishes his ElGamal public key (q, a, ya) = (101, 2, 14). You desire to send the secret message “CALL ME” to Bob. Using the equivalence A = 01, B = 02, and so on up to Z = 26, you encode the message into the number 03 01 12 12 13 05. Regarding each of these two-digit numbers as a plaintext block, compute the message that you will send to Bob using his...
Information Security Dropbox is a typical example of SaaS in cloud computing. Question 1 options: True...
Information Security Dropbox is a typical example of SaaS in cloud computing. Question 1 options: True False Question 2 (1 point) SSL cannot be combined with VPN. Question 2 options: True False Question 3 (1 point) A remote access server can provide authentication services. Question 3 options: True False Question 4 (1 point) In general, private key encryption is safer than public key encryption. Question 4 options: True False Question 5 (1 point) TLS will encrypt TCP/IP transmissions. Question 5...
Information Security I got 8/10 so please figure out which 2 answer is wrong. Question 1...
Information Security I got 8/10 so please figure out which 2 answer is wrong. Question 1 (1 point) Dropbox is a typical example of SaaS in cloud computing. Question 1 options: True False T Question 2 (1 point) SSL cannot be combined with VPN. Question 2 options: True False F Question 3 (1 point) A remote access server can provide authentication services. Question 3 options: True False T Question 4 (1 point) In general, private key encryption is safer than...
1.Which of the following statements about asymmetric-key encryption is correct? a When using asym...
1.Which of the following statements about asymmetric-key encryption is correct? a When using asymmetric-key encryption method, a total of two keys are necessary in electronic communication between two parties. b Employees in the same company share the same public key. c Most companies would like to manage the private keys for their employees. d Most companies would like to use a Certificate Authority to manage the public keys of their employees. e Two of the above are correct. 2 Which...
Using RSA Implementation:
1. Alice's RSA public key is given by (e, n) = (59, 1189). = (a) Determine Alice's private key (d, n). (b) Bob sends his first message Mi 67 to Alice, encrypting it with RSA using Alice's public key. He obtains a cypher text Cị that gets forwarded to Alice. What is Cį? (c) Bob sends his second message M2 to Alice, encrypting it with RSA using Alice's public key. Eve, who was eavesdropping on the commu-...
o-8. (15 points) Bob's simple toy RSA eryptosystem has public key kyub(n, e) (65,5), where n =p,-5x13-65 and e-5. I. Describe the key pair generation procedure for Bob to generate his private key kor- d. With the above given parameters, use EEA to calculate d 2. Describe RSA encryption procedure that Alice uses to encrypt her plaintext message x to its above given parameters, what will be y? ciphertext y before sending the message to Bob. Suppose Alice's message x-...
Q3: Suppose Bob wants to send an encrypted message to Alice. Which one of the followings is correct? 1. Bob uses a shared secret key to encrypt the message. Alice uses Bob's public key to decrypt the encrypted message. 2. Bob uses Alice's private key to encrypt the message. Alice uses a shared secret key to decrypt the encrypted message. 3. Bob uses Alice's public key to encrypt the message digest. Alice uses Bob's public key to decrypt the encrypted...
Question 4 (5 points)
Consider the following scenario: Alice wants to send Bill a
message. Alice encrypts some information using Bill's public key;
Bill decrypts the ciphertext using his private key. This is an
example of:
Question 4 options:
1)
symmetric encryption
2)
digital certificate
3)
asymmetric encryption
4)
digital signature
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