1. The message forwarded to a user with public key (47, 5, 10) and private key k = 19 ptosystem and SI (b) Indicate how the ciphertext can be decrypted using the recipient's private ke
1. The message forwarded to a user with public key (47, 5, 10) and private key k = 19 ptosystem and SI (b) Indicate how the ciphertext can be decrypted using the recipient's private ke
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
Related questions
Question
Question 1
![V. = 225. 516 = 39 · 40 = 12 (mod 43)
V2 = 313 = 12 (mod 43)
TO
the integers V1 and V2:
P Aopenba
PROBLEMS 10.3
forwarded to a user with public key (47, 5, 10) and private key k – 10
(b) Indicate how the ciphertext can be decrypted using the recipient's privats e
2. Suppose that the following ciphertext is received by a person having ElGamalnda
key (71, 7, 32) and private key k = 30:
%3D
(56,45) (56, 38)
(56, 05) (56, 27)
(56, 29) (56, 03) (56,67)
(56, 31) (56, 38) (56, 29)
Obtain the plaintext message.
3. The message NOT NOW (numerically 131419131422) is to be sent to a user of the
EIGamal system who has public key (37, 2, 18) and private key k = 17. If the integer
j used to construct the ciphertext is changed over successive four-digit blocks from
j = 13 to j = 28 to j = 11, what is the encrypted message produced?
4. Assume that a person has ElGamal public key (2633, 3, 1138) and private key k = 960.
If the person selects the random interger j = 583 to encrypt the message BEWARE OF
THEM, obtain the resulting ciphertext.
[Hint: 3585 = 1424 (mod 2633), 1138583 = 97 (mod 2633).]
%3D
%3D
11.
%3D
%3D
The
hel
5. (a) A person with public key (31, 2, 22) and private key k = 17 wishes to signam e
164
%3D
the
signature, obtain the signature produced by the ElGamal algorithm.
(b) Confirm the validity of this signature.
ent
for
sch
Mi
int
me
me
cod](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F66c7b497-dac7-4855-b923-2e60bbc73063%2Fae9df178-7620-47e1-9e2d-743db01e96cc%2F0rlhwql.jpeg&w=3840&q=75)
Transcribed Image Text:V. = 225. 516 = 39 · 40 = 12 (mod 43)
V2 = 313 = 12 (mod 43)
TO
the integers V1 and V2:
P Aopenba
PROBLEMS 10.3
forwarded to a user with public key (47, 5, 10) and private key k – 10
(b) Indicate how the ciphertext can be decrypted using the recipient's privats e
2. Suppose that the following ciphertext is received by a person having ElGamalnda
key (71, 7, 32) and private key k = 30:
%3D
(56,45) (56, 38)
(56, 05) (56, 27)
(56, 29) (56, 03) (56,67)
(56, 31) (56, 38) (56, 29)
Obtain the plaintext message.
3. The message NOT NOW (numerically 131419131422) is to be sent to a user of the
EIGamal system who has public key (37, 2, 18) and private key k = 17. If the integer
j used to construct the ciphertext is changed over successive four-digit blocks from
j = 13 to j = 28 to j = 11, what is the encrypted message produced?
4. Assume that a person has ElGamal public key (2633, 3, 1138) and private key k = 960.
If the person selects the random interger j = 583 to encrypt the message BEWARE OF
THEM, obtain the resulting ciphertext.
[Hint: 3585 = 1424 (mod 2633), 1138583 = 97 (mod 2633).]
%3D
%3D
11.
%3D
%3D
The
hel
5. (a) A person with public key (31, 2, 22) and private key k = 17 wishes to signam e
164
%3D
the
signature, obtain the signature produced by the ElGamal algorithm.
(b) Confirm the validity of this signature.
ent
for
sch
Mi
int
me
me
cod
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