Exam 98-367 topic 1 question 63 discussion

The WPA2 PreShared Key (PSK) is created by using a passphrase (password) and salting it with the "WPS PIN".

There are two major parts to converting a password value to a decryption key. The first is called salting. It's possible you've heard this term used once or twice. This is a method in cryptography that prevents two systems from using the same key, even though they may share the same password. Without salting, a pair of machines using the same password, even coincidentally, end up with the same key. This is a vulnerability for rainbow tables, which are huge spreadsheets that allow you to look up the original password (provided you know the key). Salting largely nullifies the use of rainbow tables, because every password uses a random value to generate a different key. It also effectively renders password derivation a one-way function, because you can't backwards-generate passwords from keys. For example, SSIDs are used to salt WPA passwords. So, even if your neighbor uses the same password, he's going to have a different key if his router has a different name. Reference: https://www.tomshardware.com/reviews/wireless-security-hack,2981-5.html

I think it is will be D. No change needed. SSID should be replaced, because maybe your neighbour has the same SSID, it is not encrypted!