Question: Rafa claims that if we modify the ECB mode as follows, it will become CPA secure: As before, a message is divided into blocks, so

Rafa claims that if we modify the ECB mode as follows, it will become CPA secure: As
before, a message is divided into blocks, so a message m would be m = m0\| m1\|\| mw
(where w is an integer). For each message, we generate a fresh random string r of length
n bits, and we encrypt the message as Ek(m)=(Ek(m1\| r), Ek(m2\| r),..., Ek(mw \| r)).
Is Rafas claim true? why?
Rafa claims that if we modify the ECB mode as follows, it will become CPA secure: As
before, a message is divided into blocks, so a message m would be m = m0\| m1\|\| mw
(where w is an integer). For each message, we generate a fresh random string r of length
n bits, and we encrypt the message as Ek(m)=(Ek(m1\| r), Ek(m2\| r),..., Ek(mw \| r)).
Is Rafas claim true? why?

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 Programming Questions!

Q:

Please do not use chatgpt to answer _______________________________________________ 1. Which statements are correct A) A block cipher according to Shannon should comprise two atomic operations, i.e....

Q:

hich statements are correct A block cipher according to Shannon should comprise two atomic operations, i . e . confusion ( obscuring relationship between plaintext and ciphertext ) and diffusion (...

Q:

Which statements are correct A block cipher according to Shannon should comprise two atomic operations, i . e . confusion ( obscuring relationship between plaintext and ciphertext ) and diffusion (...

Q:

Question Completion Status: Rafa Company prepares quarterly financial statements. Each of the following items may require Rafa to make an adjusting entry. If so, determine the effect the adjustment...

Q:

Rafa Company prepares quarterly financial statements. Each of the following items may require Rafa to make an adjusting entry. If so, determine the effect the adjustment has on net income for the...

Q:

Hi, I'd like to ask how to solve this question? Thank you!! 5. Naomi and Rafa win the Australia Tennis Open and received 4.1 million as a prize. Imagine that this prize translates into a 2 % increase...

Q:

What is the issue of this case study and identify the issue of company facing? Define meaning of individualism and identify the concerns of the local Central Asia community regarding the factory...

Q:

Please read the case study and answer questions below: Case Study Rafa is the CEO of Ares , a multi-national enterprise that designs, manufactures and markets sportswear.In 2015, Rafa brokered a deal...

Q:

What is the issue of this case study and identify the issue of company facing? Define meaning of individualism and identify the concerns of the local Central Asia community regarding the factory...

Q:

Solve: (show solution) Test II A Problems: Answer the requirements for each of the following unrelated problems: (75%) (30 items @ 2.5 points each) On January 1, 2020, Rafa and Roger are combining...

Q:

Cost Analysis completed on an Excel tab that outlines the cost that will be incurred to implement the strategy. This information should correspond with the With Strategy on the Projected Financial...

Q:

What goes into determining whether a lawyers fee is reasonable? Which of the eight factors listed in MR 1.5(a) do you think is the most relevant?

Q:

Change from sum - of - the - years' digits depreciation to straight - line. Question 1 8 options: 1 ) CPR Change in Principle reported Retrospectively 2 ) CPP Change in Principle reported...

Q:

Answer the following two part problem al problem note you will NOT be asked to s You run a farm which grows peas carrots produce to bring to the farmers market Y has room for 300 total servings of...