To decode a message encrypted using DES requires finding the key from among the 256 possible 56-bit binary keys. Although you might find the key early on, the worst case is that you have to test all 256 possible DES keys. a. How long would this take using the gaming PC described in the Special Interest Box “The Tortoise and the Hare” in Chapter 3? Assume that a single key can be tested in one floating-point operation. b. How long would this take using the Chinese Sunway TaihuLight supercomputer described in the Special Interest Box “The Tortoise and the Hare” in Chapter 3? Assume that a single key can be tested in one floating-point operation.
To decode a message encrypted using DES requires finding the key from among the 256 possible 56-bit binary keys. Although you might find the key early on, the worst case is that you have to test all 256 possible DES keys. a. How long would this take using the gaming PC described in the Special Interest Box “The Tortoise and the Hare” in Chapter 3? Assume that a single key can be tested in one floating-point operation. b. How long would this take using the Chinese Sunway TaihuLight supercomputer described in the Special Interest Box “The Tortoise and the Hare” in Chapter 3? Assume that a single key can be tested in one floating-point operation.
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
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To decode a message encrypted using DES requires finding the key from among the 256 possible 56-bit binary keys. Although you might find the key early on, the worst case is that you have to test all 256 possible DES keys. a. How long would this take using the gaming PC described in the Special Interest Box “The Tortoise and the Hare” in Chapter 3? Assume that a single key can be tested in one floating-point operation. b. How long would this take using the Chinese Sunway TaihuLight supercomputer described in the Special Interest Box “The Tortoise and the Hare” in Chapter 3? Assume that a single key can be tested in one floating-point operation.
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