11.11.3 Configuring Answer Logic
Answer Logic validates if the answer provided by the user matches with what was provided during registration.
Answer Logic, a feature of KBA, increases the usability of challenge questions. Administrators can adjust how exact the challenge answers given by end users must match the answers they gave at the time of registration. If the answer given by a user is fundamentally correct but there are minor variations such as typos, misspellings, and abbreviations they should pass. The increased usability of KBA reduces or eliminates the need for unnecessary call center involvement in moderate risk situations and self service flows.
Answer Logic consists of advanced algorithms selected by the system to configure the level of tolerance of the erroneous answer. The algorithms are divided into three categories: Common Abbreviations, Keyboard Fat Fingering (accidentally pressing the nearest neighbor on the keyboard), and Phonetics.
Table 11-5 Answer Logic Algorithm Example
| Algorithm | Description | Reason |
|---|---|---|
| Common Abbreviations | This algorithm handles common abbreviations, common nicknames, common acronyms, and date format. Looks at file for allowed matches. | If the file contains Mrs=Misses, the match can be made in either direction. |
| Keyboard Fat Fingering | This algorithm handles answers with typos due to the proximity of keys on a standard keyboard. | "u" is directly to the left of "i" so it is allowed. |
| Phonetics | This algorithm handles answers that "sound like" the registered answer, regional spelling differences, and common misspellings. | Smiith sounds like Smith. |
You can enable or disable the Answer Logic algorithms. You can also configure the strength of some algorithms, such as Keyboard Fat Fingering and Phonetics for evaluating answers given for challenge questions.
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