1
GATE CSE 2019
Numerical
+2
-0
In an RSA cryptosystem, the value of the public modulus parameter n is 3007. If it is also known that $$\varphi $$(n) = 2880, where $$\varphi $$() denotes Euler's Totient Function, then the prime factor of n which is greater than 50 is ______.
Your input ____
2
GATE CSE 2016 Set 1
MCQ (Single Correct Answer)
+2
-0.6
Consider that B wants to send a message m that is digitally signed to A. Let the pair of private and public keys for A and B be denoted by $$K_x^ - $$ and $$K_x^ + $$ for x = A, B, respectively. Let Kx(m) represent the operation of encrypting m with a key Kx and H(m) represent the message digest. Which one of the following indicates the CORRECT way of sending the message m along with the digital signature to A?
3
GATE CSE 2009
MCQ (Single Correct Answer)
+2
-0.6
In the RSA public key cryptosystem, the private and public keys are (e, n) and (d, n) respectively, where n = p$$ \times $$q and p and q are large primes. Besides, n is public and p and q are private. Let M be an integer such that 0 < M < n and f(n) = (p - 1)(q - 1). Now consider the following equations.
I. M'= Me mod n
M = (M')d mod n
II. ed ≡ 1 mod n
III. ed ≡ 1 mod $$\phi $$(n)
IV. M'= Me mod $$\phi $$(n)
M = (M')d mod $$\phi $$(n)
4
GATE CSE 2008
MCQ (Single Correct Answer)
+2
-0.6
The total number of keys required for a set of n individuals to be able to communicate with each other using secret key and public key crypto-systems, respectively are:
Questions Asked from Network Security (Marks 2)
Number in Brackets after Paper Indicates No. of Questions
GATE CSE Subjects
Theory of Computation
Operating Systems
Algorithms
Database Management System
Data Structures
Computer Networks
Software Engineering
Compiler Design
Web Technologies
General Aptitude
Discrete Mathematics
Programming Languages