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Table 6 Security analysis

From: Evaluating security and usability of profile based challenge questions authentication in online examinations

Question themes

Security abuse case

N

Equality algorithm

Relaxed algorithm

Academic questions

 

Matched

Unmatched

Matched

Unmatched

Student number

1

0(0%)

1(100%)

0(0%)

1(100%)

Year started the current course

3

0(0%)

3(100%)

0(0%)

3(100%)

Year of highest qualification

1

1(100%)

0(0%)

1(100%)

0(0%)

Highest qualification

2

0(0%)

2(100%)

0(0%)

2(100%)

Find out about this course

0

*NA

*NA

*NA

*NA

Name of last school attended

2

0(0%)

2(100%)

0(0%)

2(100%)

Grades in highest qualification

2

0(0%)

2(100%)

0(0%)

2(100%)

Month started the current course

2

0(0%)

2(100%)

0(0%)

2(100%)

Total

1(8%)

12(92%)

1(8%)

12(92%)

Personal questions

Best friend’s surname

1

0(0%)

1(100%)

0(0%)

1(100%)

Country of birth

2

1(50%)

1(50%)

2(100%)

0(0%)

Father’s surname

1

0(0%)

1(100%)

1(100%)

0(0%)

Dream job as a child

0

*NA

*NA

*NA

*NA

Total

1(25%)

3(75%)

3(75%)

1(25%)

Favourite questions

Tutor

1

0(0%)

1(100%)

0(0%)

1(100%)

Hero of your childhood?

0

*NA

*NA

*NA

*NA

Module on this course?

1

0(0%)

1(100%)

0(0%)

1(100%)

Total

0(0%)

2(100%)

0(0%)

2(100%)

Contact questions

Home tel no with country code

1

0(0%)

1(100%)

0(0%)

1(100%)

Home address town

1

0(0%)

1(100%)

0(0%)

1(100%)

House name or number

1

0(0%)

1(100%)

0(0%)

1(100%)

Mobile number including country code

1

1(100%)

0(0%)

1(100%)

0(0%)

Total

1(25%)

3(75%)

1(25%)

3(75%)

Date questions

Date of birth?

1

0(0%)

1(100%)

0(0%)

1(100%)

Grand total

24

3(13%)

21(88%)

5(21%)

19(79%)

  1. *NA: Questions not presented due to randomization.
  2. Data in bold-face show an increase in correct answers during abuse case when results were computed using a relaxed algorithm.