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Recent questions tagged cryptography

0 votes
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32
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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2 votes
1 answer
33
Networking
Using RSA, choose p = 3 and q = 11, and encrypt “DOG” as one message m.
Using RSA, choose p = 3 and q = 11, and encrypt “DOG” as one message m.
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6 votes
3 answers
34
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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0 votes
1 answer
39
Cryptography
what is the difference between public key and private key ?
what is the difference between public key and private key ?
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1 votes
1 answer
41
UGC NET CSE | September 2013 | Part 3 | Question: 57
If user A wants to send an encrypted message to user B, the plain text of A is encrypted with the Public key of user A Public key of user B Private key of user A Private key of user B
If user A wants to send an encrypted message to user B, the plain text of A is encrypted with thePublic key of user APublic key of user BPrivate key of user APrivate key ...
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2 votes
3 answers
43
UGC NET CSE | December 2014 | Part 2 | Question: 30
How many distinct stages are there in $DES$ algorithm, which is parameterized by a $56$-bit key ? $16$ $17$ $18$ $19$
How many distinct stages are there in $DES$ algorithm, which is parameterized by a $56$-bit key ?$16$$17$$18$$19$
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1 votes
1 answer
44
UGC NET CSE | September 2013 | Part 2 | Question: 3
Which of the following substitution technique have the relationship between a character in the plaintext and a character in the ciphertext as one-to-many? Monoalphabetic Polyalphabetic Transpositional None of the above
Which of the following substitution technique have the relationship between a character in the plaintext and a character in the ciphertext as one-to-many?MonoalphabeticPo...
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1 votes
1 answer
45
UGC NET CSE | June 2014 | Part 3 | Question: 56
Match the following cryptographic algorithms with their design issues : ... $\text{a-iii, b-iv, c-ii, d-i}$ $\text{a-iv, b-i, c-ii, d-iii}$
Match the following cryptographic algorithms with their design issues : $ \begin{array} {cIcI} & \textbf{List-I} & & \textbf{List-II} \\ \text{a.} & \text{DES} & \te...
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0 votes
1 answer
47
Cryptography
In _______-key cryptography, everyone has access to all the public keys. A. PRivate B. Public C. Symmetric D. Certfied
In _______-key cryptography, everyone has access to all the public keys.A. PRivateB. PublicC. SymmetricD. Certfied
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5 votes
2 answers
48
ISRO2009-7
Advanced Encryption Standard (AES) is based on Asymmetric key algorithm Symmetric key algorithm Public key algorithm Key exchange
Advanced Encryption Standard (AES) is based onAsymmetric key algorithmSymmetric key algorithmPublic key algorithmKey exchange
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3 votes
3 answers
49
ISRO-2013-46
Which of the following encryption algorithms is based on the Feistal structure? Advanced Encryption Standard RSA public key cryptographic algorithm Data Encryption standard RC4
Which of the following encryption algorithms is based on the Feistal structure?Advanced Encryption StandardRSA public key cryptographic algorithmData Encryption standardR...
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4 votes
1 answer
50
ISRO-2013-21
What will be the cipher text produced by the following cipher function for the plain text ISRO with key $k=7$. [ Consider $'A'=0, 'B'=1,....'Z'=25$] $C_{k} (M) = (kM + 13) \mod 26$ RJCH QIBG GQPM XPIN
What will be the cipher text produced by the following cipher function for the plain text ISRO with key $k=7$. [ Consider $'A'=0, 'B'=1,....'Z'=25$]$C_{k} (M) = (kM + 13)...
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27 votes
5 answers
51
GATE CSE 2016 Set 2 | Question: 23
Anarkali digitally signs a message and sends it to Salim. Verification of the signature by Salim requires. Anarkali's public key. Salim's public key. Salim's private key. Anarkali's private key.
Anarkali digitally signs a message and sends it to Salim. Verification of the signature by Salim requires.Anarkali's public key.Salim's public key.Salim's private key.Ana...
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3 votes
2 answers
52
Diffie Hellman
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