GATE Exam  >  GATE Questions  >  Using public key cryptography, X adds a digit... Start Learning for Free
Using public key cryptography, X adds a digital signature σ to message M, encrypts <M,
σ >, and sends it to Y, where it is decrypted. Which one of the following sequences of keys is
used for the operations?
  • a)
    Encryption: X’s private key followed by Y’s private key; Decryption: X’s public key
    followed by Y’s public key
  • b)
    Encryption: X’s private key followed by Y’s public key; Decryption: X’s public key
    followed by Y’s private key
  • c)
    Encryption: X’s public key followed by Y’s private key; Decryption: Y’s public key
    followed by X’s private key
  • d)
    Encryption: X’s private key followed by Y’s public key; Decryption: Y’s private key
    followed by X’s public key
Correct answer is option 'D'. Can you explain this answer?
Verified Answer
Using public key cryptography, X adds a digital signature σ to m...
 
View all questions of this test
Most Upvoted Answer
Using public key cryptography, X adds a digital signature σ to m...
Understanding the Scenario:
In this scenario, X adds a digital signature to message M, encrypts , and sends it to Y for decryption.

Sequence of Keys:

Encryption:
- X first signs the message M using their private key to create the digital signature σ.
- X then encrypts the message M along with the signature σ using Y's public key before sending it to Y.

Decryption:
- Y receives the encrypted message and first decrypts it using their private key to retrieve the original message M and the digital signature σ.
- Y then verifies the signature σ using X's public key to ensure the authenticity of the message.

Correct Sequence:
The correct sequence of keys used for the operations is:
- Encryption: X's private key followed by Y's public key
- Decryption: Y's private key followed by X's public key
This sequence ensures that the message is securely encrypted using Y's public key and can only be decrypted by Y using their private key, while also verifying the signature using X's public key to ensure the message's authenticity.
Explore Courses for GATE exam
Using public key cryptography, X adds a digital signature σ to message M, encrypts <M,σ >, and sends it to Y, where it is decrypted. Which one of the following sequences of keys isused for the operations?a)Encryption: X’s private key followed by Y’s private key; Decryption: X’s public keyfollowed by Y’s public keyb)Encryption: X’s private key followed by Y’s public key; Decryption: X’s public keyfollowed by Y’s private keyc)Encryption: X’s public key followed by Y’s private key; Decryption: Y’s public keyfollowed by X’s private keyd)Encryption: X’s private key followed by Y’s public key; Decryption: Y’s private keyfollowed by X’s public keyCorrect answer is option 'D'. Can you explain this answer?
Question Description
Using public key cryptography, X adds a digital signature σ to message M, encrypts <M,σ >, and sends it to Y, where it is decrypted. Which one of the following sequences of keys isused for the operations?a)Encryption: X’s private key followed by Y’s private key; Decryption: X’s public keyfollowed by Y’s public keyb)Encryption: X’s private key followed by Y’s public key; Decryption: X’s public keyfollowed by Y’s private keyc)Encryption: X’s public key followed by Y’s private key; Decryption: Y’s public keyfollowed by X’s private keyd)Encryption: X’s private key followed by Y’s public key; Decryption: Y’s private keyfollowed by X’s public keyCorrect answer is option 'D'. Can you explain this answer? for GATE 2024 is part of GATE preparation. The Question and answers have been prepared according to the GATE exam syllabus. Information about Using public key cryptography, X adds a digital signature σ to message M, encrypts <M,σ >, and sends it to Y, where it is decrypted. Which one of the following sequences of keys isused for the operations?a)Encryption: X’s private key followed by Y’s private key; Decryption: X’s public keyfollowed by Y’s public keyb)Encryption: X’s private key followed by Y’s public key; Decryption: X’s public keyfollowed by Y’s private keyc)Encryption: X’s public key followed by Y’s private key; Decryption: Y’s public keyfollowed by X’s private keyd)Encryption: X’s private key followed by Y’s public key; Decryption: Y’s private keyfollowed by X’s public keyCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for GATE 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Using public key cryptography, X adds a digital signature σ to message M, encrypts <M,σ >, and sends it to Y, where it is decrypted. Which one of the following sequences of keys isused for the operations?a)Encryption: X’s private key followed by Y’s private key; Decryption: X’s public keyfollowed by Y’s public keyb)Encryption: X’s private key followed by Y’s public key; Decryption: X’s public keyfollowed by Y’s private keyc)Encryption: X’s public key followed by Y’s private key; Decryption: Y’s public keyfollowed by X’s private keyd)Encryption: X’s private key followed by Y’s public key; Decryption: Y’s private keyfollowed by X’s public keyCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Using public key cryptography, X adds a digital signature σ to message M, encrypts <M,σ >, and sends it to Y, where it is decrypted. Which one of the following sequences of keys isused for the operations?a)Encryption: X’s private key followed by Y’s private key; Decryption: X’s public keyfollowed by Y’s public keyb)Encryption: X’s private key followed by Y’s public key; Decryption: X’s public keyfollowed by Y’s private keyc)Encryption: X’s public key followed by Y’s private key; Decryption: Y’s public keyfollowed by X’s private keyd)Encryption: X’s private key followed by Y’s public key; Decryption: Y’s private keyfollowed by X’s public keyCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for GATE. Download more important topics, notes, lectures and mock test series for GATE Exam by signing up for free.
Here you can find the meaning of Using public key cryptography, X adds a digital signature σ to message M, encrypts <M,σ >, and sends it to Y, where it is decrypted. Which one of the following sequences of keys isused for the operations?a)Encryption: X’s private key followed by Y’s private key; Decryption: X’s public keyfollowed by Y’s public keyb)Encryption: X’s private key followed by Y’s public key; Decryption: X’s public keyfollowed by Y’s private keyc)Encryption: X’s public key followed by Y’s private key; Decryption: Y’s public keyfollowed by X’s private keyd)Encryption: X’s private key followed by Y’s public key; Decryption: Y’s private keyfollowed by X’s public keyCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of Using public key cryptography, X adds a digital signature σ to message M, encrypts <M,σ >, and sends it to Y, where it is decrypted. Which one of the following sequences of keys isused for the operations?a)Encryption: X’s private key followed by Y’s private key; Decryption: X’s public keyfollowed by Y’s public keyb)Encryption: X’s private key followed by Y’s public key; Decryption: X’s public keyfollowed by Y’s private keyc)Encryption: X’s public key followed by Y’s private key; Decryption: Y’s public keyfollowed by X’s private keyd)Encryption: X’s private key followed by Y’s public key; Decryption: Y’s private keyfollowed by X’s public keyCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Using public key cryptography, X adds a digital signature σ to message M, encrypts <M,σ >, and sends it to Y, where it is decrypted. Which one of the following sequences of keys isused for the operations?a)Encryption: X’s private key followed by Y’s private key; Decryption: X’s public keyfollowed by Y’s public keyb)Encryption: X’s private key followed by Y’s public key; Decryption: X’s public keyfollowed by Y’s private keyc)Encryption: X’s public key followed by Y’s private key; Decryption: Y’s public keyfollowed by X’s private keyd)Encryption: X’s private key followed by Y’s public key; Decryption: Y’s private keyfollowed by X’s public keyCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Using public key cryptography, X adds a digital signature σ to message M, encrypts <M,σ >, and sends it to Y, where it is decrypted. Which one of the following sequences of keys isused for the operations?a)Encryption: X’s private key followed by Y’s private key; Decryption: X’s public keyfollowed by Y’s public keyb)Encryption: X’s private key followed by Y’s public key; Decryption: X’s public keyfollowed by Y’s private keyc)Encryption: X’s public key followed by Y’s private key; Decryption: Y’s public keyfollowed by X’s private keyd)Encryption: X’s private key followed by Y’s public key; Decryption: Y’s private keyfollowed by X’s public keyCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice Using public key cryptography, X adds a digital signature σ to message M, encrypts <M,σ >, and sends it to Y, where it is decrypted. Which one of the following sequences of keys isused for the operations?a)Encryption: X’s private key followed by Y’s private key; Decryption: X’s public keyfollowed by Y’s public keyb)Encryption: X’s private key followed by Y’s public key; Decryption: X’s public keyfollowed by Y’s private keyc)Encryption: X’s public key followed by Y’s private key; Decryption: Y’s public keyfollowed by X’s private keyd)Encryption: X’s private key followed by Y’s public key; Decryption: Y’s private keyfollowed by X’s public keyCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice GATE tests.
Explore Courses for GATE exam
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev