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Recent questions tagged network-security

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61
Doubt!
You generate a perfectly random key K. You send two messages, M1 and M2, encrypted with K (C1 = K xor M1 and C2 = K xor M2). Does sending C2 leak information about M1 and M2?
You generate a perfectly random key K. You send two messages, M1 and M2, encrypted with K (C1 = K xor M1 and C2 = K xor M2). Does sending C2 leak information about M1 and...
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63
Cryptography
Can a single secret key can be used by the sender to sign documents for multiple receiver ? I think we can because purpose of digital signature is to make sure that on the way data is not corrupted and also it is coming from the source expected by us.
Can a single secret key can be used by the sender to sign documents for multiple receiver ?I think we can because purpose of digital signature is to make sure that on the...
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64
REGARDING CRYPTOGRAPHY
WHAT ALL TOPICS SHOULD BE COVERED IN CRYPTOGRAPHY IN NETWORKS.?
WHAT ALL TOPICS SHOULD BE COVERED IN CRYPTOGRAPHY IN NETWORKS.?
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4 votes
3 answers
68
ISRO2017-37
Pretty Good Privacy (PGP) is used in: Browser security FTP security Email security None of the above
Pretty Good Privacy (PGP) is used in:Browser securityFTP securityEmail securityNone of the above
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5 votes
1 answer
69
ISRO2017-36
Which protocol suite designed by IETF to provide security for a packet at the Internet layer? IPSec NetSec PacketSec SSL
Which protocol suite designed by IETF to provide security for a packet at the Internet layer?IPSecNetSecPacketSecSSL
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6 votes
3 answers
70
ISRO2017-35
$\text{MD5}$ is a widely used hash function for producing hash value of $64$ bits $128$ bits $512$ bits $1024$ bits
$\text{MD5}$ is a widely used hash function for producing hash value of$64$ bits$128$ bits$512$ bits$1024$ bits
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71
Self doubt(Computer network security)
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0 votes
1 answer
74
NPTEL-Internetwork Security-Week2-Quiz-2-Q6
Q6. ___________Data Encryption Standard (DES) was designed to increase the size of the Data Encryption Standard (DES) key. (A) Double (B) Triple (C) Quadruple (D) none of these
Q6. ___________Data Encryption Standard (DES) was designed to increase the size of the Data Encryption Standard (DES) key.(A) Double(B) Triple(C) Quadruple(D) none of the...
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0 votes
2 answers
75
NPTEL-Internetwork Security-Week2-Quiz-2-Q3
Q3: What kind of ciphers Electronic Codebook (ECB) mode and Cipher Block Chaining (CBC) mode are (A) Block cipher (B) Stream cipher (C) Field cipher (D) both (A) and (B)
Q3: What kind of ciphers Electronic Codebook (ECB) mode and Cipher Block Chaining (CBC) mode are(A) Block cipher(B) Stream cipher(C) Field cipher(D) both (A) and (B)
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76
testbook
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2 votes
2 answers
77
gatebook
Suppose that in RSA encryption, the public encryption key is the pair (e n)= (3, 55) and the private decryption key is the pair (d,n)=55, where d (A) 13 (B) 27 (C) 37 (D) 39
Suppose that in RSA encryption, the public encryption key is the pair (e n)= (3, 55) and the private decryption key is the pair (d,n)=55, where d(A) 13(B) 27(C) 37(D) 39
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1 answer
81
UGC NET CSE | December 2010 | Part 2 | Question: 20
Which of the following is the process by which a user’s access to physical data in the application is limited, based on his privileges? Authorization Authentication Access Control All of these
Which of the following is the process by which a user’s access to physical data in the application is limited, based on his privileges?AuthorizationAuthenticationAccess...
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1 votes
0 answers
83
Crytography
From where shall I study cryptography and network security for GATE?
From where shall I study cryptography and network security for GATE?
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2 votes
1 answer
84
UGC NET CSE | June 2016 | Part 3 | Question: 30
Encrypt the plain text message $``\text{EXTRANET}"$ ... Using $`\text{Z'}$ as bogus character. $\text{TAXERTZENZ}$ $\text{EXTRANETZZ}$ $\text{EZXZTRZANZET}$ $\text{EXTZRANZETZ}$
Encrypt the plain text message $ \text{EXTRANET}"$ using Transposition cipher technique with the following key : $\begin{array} {|l|l|l|l|l|} \hline \text{3} & \text{5} ...
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3 votes
2 answers
85
UGC NET CSE | June 2016 | Part 2 | Question: 29
If there are $N$ people in the world and are using secret key encryption and decryption for privacy purpose, then the number of secret keys required will be $N$ $(N-1)$ $\frac{N(N-1)}{2}$ $\frac{N(N+1)}{2}$
If there are $N$ people in the world and are using secret key encryption and decryption for privacy purpose, then the number of secret keys required will be$N$$(N-1)$$\fr...
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2 votes
2 answers
86
UGC NET CSE | December 2015 | Part 2 | Question: 25
Using p=3, q=13, d=7 and e=3 in the RSA algorithm, what is the value of ciphertext for a plain text 5? 13 21 26 33
Using p=3, q=13, d=7 and e=3 in the RSA algorithm, what is the value of ciphertext for a plain text 5?13212633
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3 votes
1 answer
87
UGC NET CSE | Junet 2015 | Part 3 | Question: 28
A message "COMPUTERNETWORK" encrypted (ignore quotes) using columnar transposition cipher with a key "LAYER". The encrypted message is CTTOEWMROPNRUEK MROUEKCTTPNROEW OEWPNRCTTUEKMRO UEKPNRMROOEQCTT
A message "COMPUTERNETWORK" encrypted (ignore quotes) using columnar transposition cipher with a key "LAYER". The encrypted message isCTTOEWMROPNRUEKMROUEKCTTPNROEWOEWPNR...
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2 votes
2 answers
88
UGC NET CSE | Junet 2015 | Part 3 | Question: 27
Which are two modes of IP security? Transport and certificate Transport and tunnel Certificate and tunnel Preshared and transport
Which are two modes of IP security?Transport and certificateTransport and tunnelCertificate and tunnelPreshared and transport
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