Question: In the commitment scheme discussed in the class, if we implement the commitment for message m ( e . g . , bid price )

In the commitment scheme discussed in the class, if we implement the commitment for message m (e.g., bid price) using a secure hash function H as follows, is it still secure? Please explain. Recall that r and m are kept secret until they are revealed. C(m)= H(r XOR m)

Step by Step Solution

There are 3 Steps involved in it

1 Expert Approved Answer
Step: 1 Unlock blur-text-image
Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock
Step: 3 Unlock

Students Have Also Explored These Related Databases Questions!

Q:

In the commitment scheme discussed in Week 2, if we implement the commitment for message m (e.g., bid price for an auction) using a secure hash function H as follows instead, does it provide the same...

Q:

Provide an appropriate query to show that the above program can give an incorrect result. [4 marks] (b) Explain the cause of the error. [6 marks] (c) Suggest a correction. [5 marks] (d) Write a...

Q:

Microkernel operating systems aim to address perceived modularity and reliability issues in traditional "monolithic" operating systems. (i) Describe the typical architecture of a microkernel...

Q:

can someone solve this Modern workstations typically have memory systems that incorporate two or three levels of caching. Explain why they are designed like this. [4 marks] In order to investigate...

Q:

PROBLEM 1 GCD EXTENDED-EUCLID(a,b) where a b 1 if a mod b = 0 return (0,1) 2 (x,y) + EXTENDED-EUCLID(b, a mod b) 3 return (y,x y(a/b])) Use the extended Euclid algorithm presented in class to compute...

Q:

PROBLEM 3 Textbook RSA is insecure Consider the textbook RSA signature scheme with the public key and private keys pk = e, sk = d, and die = 1 mod (n) for an RSA modulus n = pq and: 1. Signsk(m):...

Q:

import java.util.Random; public class CSCI225Lab7Driver { static Random r = new Random(System.nanoTime()); // The following constants can be changed static final int maxkey = 10000; // size of...

Q:

There are two problems due this week (each worth 35 points) as follows. Case 5-1David L. Miller: Portrait of a White-Collar Criminal (page 144). In comprehensive paragraphs, answerrequirements 1?6....

Q:

Need Help... Instructions: This programming assignment is designed to develop your Scheme programming skills and to illustrate how functional programming can be used for security applications. In...

Q:

Hash Tables and Open Addressing In this lab you are given an implementation of an open addressing hash table. Download the files MyHashTable.java and CSCI225Lab7Driver.java and add them to a new...

Q:

Peculiar Co. acquired an 80% interest in Situation, Inc. a number of years ago. How much was paid, and how long ago this all happencd, is lost amid the sands of time. However, we have this year's...

Q:

For more than a half century, a dozen African countries pegged their currency, the CFA franc, to the French franc. Many analysts felt that central bank intervention caused the CFA franc to become...

Q:

If you spend money to buy some bonds, your Question 2Select one: A. liquidity increases and interest earning decreases. B. liquidity increases and interest earning remains unchanged. C. liquidity...

Q:

Mecanismo A ( 2 DTN) W(CO) 4 + 3 cis-( 1 DTN) ( 3 ) W(CO) 4 cis-( 1 DTN) ( 3 ) W(CO) 4 + 3 cis-( 3 ) 2 W(CO) 4 cis-( 3 ) 2 W(CO) 4 -( 3 ) 2 W(CO) 4 Mecanismo B ( 2 DTN) W(CO) 4 + 3 cis-( 1 DTN) ( 3 )...

Q:

In Visual Studio 2017 with an open OLAP Cube, what is the connection to an advanced OLAP viewer?

Q:

What is the main benefit of the multidimensional framework of OLAP Cubes?

Q:

Provide an example of how the sort level Unspecified can be excluded from the Gender Dimension in a Pivot Table worksheet genderwaggap01.