MS-E1687 - Advanced Topics in Cryptography V D, Lecture, 8.1.2024-8.4.2024
This course space end date is set to 08.04.2024 Search Courses: MS-E1687
08 Assignment
Deadline: March 15, 2024
Exercise 1: Ask questions (2 points), discussion: March 18, 2024
Exercise 2:
(a) What is the freshness predicate for full forward secrecy which this paper considers? (0.5 points)
(b) How does this freshness predicate differ from the freshness predicate for full forward secrecy in Assignment 4 and why? (0.5 points)
(c) What is the difference between weak forward secrecy and full forward secrecy? (0.5 points)
(d) What is a key confirmation message and how/why does it help to upgrade from weak to full forward secrecy? (0.5 p)
(e) Describe your understanding of why the security loss in the number of parties occurs in the reduction and why this seems hard to avoid. Of course, it is hard to avoid, because the paper has a proof that it is hard to avoid... ...but what is the conceptual reason in your understanding (you do not need to read the impossibility result and I did not include it into the printout)? (1pt)
- 11 March 2024, 11:44 PM