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Bob selects E67(2, 3) as the elliptic curve over GF(p). He selects e1 = (2, 22) and d = 4
Which among the following values: 17, 20, 38, and 50, does not have primitive roots in the group G = <Zn∗, ×>?
Find the solution of x^2≡3 mod 23
In Elgamal cryptosystem, given the prime p=31. Encrypt the message “HELLO”; use 00 to 25 for encoding. The value of C2 for character ‘L’ is
In Elgamal cryptosystem, given the prime p=31. What is the respective plaintext character for C = (27, 20)?
The multiplicative Inverse of 550 mod 1769 is –
It is desirable to revoke a certificate before it expires because –
Suppose that A has obtained a certificate from certification authority X1 and B has obtained certificate authority from CA X2. A can use a chain of certificates to obtain B’s public key. In notation of X.509, the correct order of this chain is represented as –
A total of seven messages are required in the Public-Key distribution scenario. However, the initial five messages need to be used only infrequently because both A and B can save the other’s public key for future – a technique known as ____________
Which of the following statements are true?
The blowfish algorithm’s key expansion converts a key of at most 448 bits into several subkey arrays totaling ___ bytes
Which of the following statements are true with respect to the blowfish algorithm?
The last two blocks of the XTS-AES mode are
How many keys are used in the ANSI X9.17 PRNG?
Maurer’s Universal Statistical Test is
On Encrypting “thepepsiisintherefrigerator” using Vignere Cipher System using the keyword “HUMOR” we get cipher text
Consider the cipher text message: YJIHX RVHKK KSKHK IQQEV IFLRK QUZVA EVFYZ RVFBX UKGBP KYVVB QTAJK TGBQO ISGHU CWIKX QUXIH DUGIU LMWKG CHXJV WEKIH HEHGR EXXSF DMIIL UPSLW UPSLW AJKTR WTOWP IVXBW NPTGW EKBYU SBQWS Relative Frequencies 3 7 2 2 5 5 7 9 11 4 14 4 2 1 3 4 6 5 6 5 7 10 9 8 4 2 The Ind
The plain text for the cipher text RRLMWBKASPDH. Given the encryption key [(17 17 5 | 21 18 21 | 2 2 19)] is –
The Inverse S-box value for byte stored in cell (D,2)
Division of (131B6C3) base 16 by (lA2F) base 16 yeilds
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