Which method provides perfect forward secrecy

Assignment Help Basic Computer Science

Reference no: EM131329168

In this exercise, we want to analyze some variants of key derivation. In practice, one masterkey kMK is exchanged in a secure way (e.g. certificate-based DHKE) between the involved parties. Afterwards, the session keys are regularly updated by use of key derivation. For this purpose, three different methods are at our disposal:

where h() marks a (secure) hash function, and ki is the ith session key.

1. What are the main differences between these three methods?

2. Which method provides Perfect Forward Secrecy?

3. Assume Oscar obtains the nth session key (e.g., via brute-force). Which sessions can he now decrypt (depending on the chosen method)?

4. Which method remains secure if the masterkey kMK is compromised? Give a rationale!

Reference no: EM131329168

Questions Cloud

What implications can we derive for the ways : What implications can we derive for the ways in which Tesla Motors should compete in the U.S. car industry - what would be your top three recommendations for Elon Musk and How has using this model for analysis impacted your analysis of Tesla's strate..

How many keys are collectively needed : Imagine a peer-to-peer network where 1000 users want to communicate in an authenticated and confidential way without a central Trusted Third Party (TTP). ]

What is long term rate of dividend growth expected by market : If the required rate of return on this stock is 9 percent and the current market price is $45.64, what is the long-term rate of dividend growth expected by the market?

Select two court cases : Select TWO court cases (from different chapters) from the list below, and respond in writing to the case questions - Text book, lectures, and other materials in the course may be used, but are not counted toward the three reference requirement.

Which method provides perfect forward secrecy : Which method remains secure if the masterkey kMK is compromised? Give a rationale!

Explain potential benefits that a flat tax structure have : Analyze the potential benefits that a flat tax structure might have on both taxpayers and the United States Treasury. Defend or critique a flat tax structure.

Develop a report that includes the concept of sustainability : Develop a comprehensive report that includes an introduction to the concept of sustainability. Identification and analysis of effective sustainability strategies employed by leading businesses.

What is the difference between vulnerability and exposure : How is infrastructure protection (assuring the security of utility services) related to information security?

What is the market price of st stock : Accordingly, investors expect ST common stock to pay a $4 dividend next year and shrink by 10 percent per year indefinitely. What is the market price of ST stock if investors require a 12 percent return?

User Account

All Pages