Exam SY0-601 topic 1 question 133 discussion

Crossover Error Rate (CER)—the point at which FRR and FAR meet. The lower the CER, the more efficient and reliable the technology. Errors are reduced over time by tuning the system. This is typically accomplished by adjusting the sensitivity of the system until CER is reached.

"with the highest likelihood that an unauthorized user will be denied access" - I would think this is D (False Acceptance Rate).

The system is not tuned to CER. It talks about highest rate / likelihood of denial which means FAR. At its most extreme unbalanced configuration FAR.

I will say D

D:))FAR

You would look at FAR (False Acceptance Rate), Who cares how many false rejections there are, or how calibrated FAR is to FRR (CER), your question is asking you to do the best at stopping unathorized access, so the only number you care about is FAR (False acceptance rate = lowest FAR = best solution, ignore rest of numbers)

The False Acceptance Rate (FAR) measures the likelihood that the biometric system will incorrectly accept an unauthorized user. A lower FAR indicates a higher likelihood that an unauthorized user will be denied access, making it a crucial factor to consider when comparing biometric solutions for security purposes.

The problem is the options don't indicate whether FRR/FAR/CER are high or low, but what we do know is that: FRR: Tends to rejects authorized users FAR: Tends to accept unauthorized users CER: Allows overall accuracy in distinguishing between legitimate and unauthorized users. This is the point where the false acceptance rate (FAR) and the false rejection rate (FRR) are equal. So the most likely answer would be CER purely based on the options given.

After deliberating on this question for a couple of days, I’ve come to the conclusion that the answer is definitely E. CER The key sentence is “highest likelihood that an unauthorized user will be denied access.” This statement alone points to Crossover Error Rate. FRR = the “likelihood an AUTHORIZED user is REJECTED” FAR = the “likelihood an UNAUTHORIZED user is ACCEPTED” When the goal is to find where FAR and FRR intersect, you get CER. The lower the CER value, the better system performance AKA….(drum roll please) “highest likelihood that an UNAUTHORIZED user will be (REJECTED)” That why the organization should use E. CER to compare biometric solutions.

CER alone won't indicate the FAR as it's also dependent on FRR, so you can't make a valid comparison of systems in this case.

I thought FAR at first, as that would be something to look for, however, companies typically use CER rates in their advertisements, which makes comparison shopping easier.

Nowhere in the question does it state that this org cares anything about FRR, so both that and CER are out. The only thing they care about is FAR rates.

E. CER - The key key word for me is “compare”.

In the specific scenario where the focus is on denying unauthorized users, FAR would be the most relevant metric.

They don't mention balance, so it's not CER.

"highest likelihood that an unauthorized user will be denied access" D is the correct answer. Don't overthink. They don't want a balanced system according to the question. There are trying to reject the person who is unauthorised.

In order to keep CER low you have to work on keeping FAR low isn't? So coompany should focus on FAR. CER will be low automaticly. ??