Use Your Words: Designing One-time Pairing Codes to Improve User Experience
summary
Compares three pairing formats—alphanumeric (5 chars from 56 → >500 million codes), numeric (9 digits), and three 3-letter English words (≈800 words^3 → >5 billion)—with 20 participants typing 120 codes each on phones and laptops. Measures: entry time, error rate, eye fixations, and NASA‑TLX. Words are significantly faster, produce fewer fixations, and equal error rates; workload ratings lowest for words. Security target is at least 500 million possible codes. Participants used their own phones; keyboard type was not tracked.
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chapters (9)
- 0:00Introduction to pairing codes
- 1:08Designing secure access codes
- 3:56Testing alphanumeric codes
- 4:39Exploring numeric and words codes
- 6:05User study setup and methods
- 6:48Results speed and accuracy
- 7:54User workload and preferences
- 8:16Conclusion and recommendations
- 8:59Q&A session
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