Tech Question of the Day (Security+) – Please pass the salt…

Tech question of the day (Security+): Examine the figure (click to enlarge).

Questions: 1. What did I encrypt? 2. How many iterations (or rounds) were performed?

(see answer below and video response)



I created a password for the GRUB bootloader in Linux and encrypted it using PBKDF2. This utilized the SHA512 cryptographic hash which ran for 10,000 rounds (iterations). The amount of rounds can be modified, but be careful when doing so – as it may increase computational time considerably -, and be sure to test it before putting a system into production.

The video solution below describes key stretching, salting and PBKDF2.

Video Solution:

Do you enjoy learning by watching? Then check out the CompTIA Security+ (SY0-401) Complete Video Course by fellow instructor Michael J Shannon.

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