Estimation of time required for brute-force search attack on the password-based encryption
Estimation of time required for brute-force searchattack on the password-based encryptionThis assignment asks you to estimate the time required for successful brute-force searchattack on password-based encryption using JCA in Java. It assumes that you have done Lab 1, Lab2, Lab3 (see attachment, please use the code snippet in the attachment, not your own).1. Make a list of passwords, mentioned in item 3 of Section 1.2 of Lab 1 instructions (page 2)2. For password-based DES encryption implementation in JCA (Lab 2 and Lab 3) fix some salt and iteration count and record an average time required for encryption/decryption (done in Lab 3);3. For each of the passwords above estimate the time required for successful brute-force search attack, assuming that an attacker knows:• the predefined plaintext;• the ciphertext produced;• the salt;• the iteration count;• but no password.4. Investigate how the time required for the attack depends on the iteration count;5. Consider a variant of the attack, in which an attacker knows everything as above, except the iteration count, and estimate the time required to recover the passwords;6. Compare your estimated time with the estimated time returned for the same passwords by online services (Lab 1, page 2) and propose plausible explanation of any observed differences.7. Write a report on the above, providing an evidence for your arguments (e.g. snippets of code used to estimate time required for one encryption).Please notice that the assignment tasks above do not assume that you will implement a program for full brute-force search.
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