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## Marks 1

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The value of 351 mod 5 is_________.
GATE CSE 2019
A sender S sends a message m to receiver R, which is digitally signed by S with its private key. In this scenario, one o...
GATE CSE 2017 Set 1
Anarkali digitally signs a message and sends it to Salim. Verification of the signature by Salim requires
GATE CSE 2016 Set 2
Suppose that everyone in a group of N people wants to communicate secretly with the N - 1 others using symmetric key cry...
GATE CSE 2015 Set 1
Which one of the following are used to generate a message digest by the network security protocols? (P) RSA (Q) SHA-1 (...
GATE CSE 2014 Set 1
Using public key cryptography, X adds a digital signature σ to message M, encrypts, and sends it to Y, where it is decry...
GATE CSE 2013
A layer-4 firewall (a device that can look at all protocol headers up to the transport layer) CANNOT
GATE CSE 2011
Exponentiation is a heavily used operation in public key cryptography. Which of the following options is the tightest up...
GATE CSE 2007
The minimum positive integer p such that (3p modulo 17) = 1 is
GATE CSE 2007
Consider the following two statements: i. A hash function (these are often used for computing digital signatures) is an...
GATE CSE 2007
A sender is employing public key Cryptography to send a secret message to a receiver. Which one of the following stateme...
GATE CSE 2004

## Marks 2

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In an RSA cryptosystem, the value of the public modulus parameter n is 3007. If it is also known that $$\varphi$$(n) = ...
GATE CSE 2019
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 a...
GATE CSE 2016 Set 1
In the RSA public key cryptosystem, the private and public keys are (e, n) and (d, n) respectively, where n = p \times...
GATE CSE 2009
The total number of keys required for a set of n individuals to be able to communicate with each other using secret key ...
GATE CSE 2008
Suppose that two parties A and B wish to setup a common secret key (D - H key) between themselves using the Diffie-Hellm...
GATE CSE 2005

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