Session
Computer Science and Communication Engineering
Description
As passwords remain the main online authentication method, focus has shifted from naive entropy to how usability improvements can increase security. Chatterjee et al. recently introduced the first two typotolerant password checkers, which improve usability at no security cost but are technically complex. We look at the more general problem of computing an edit distance between two strings without having direct access to those strings — by storing the equivalent of a hash. We propose a simpler algorithm for this problem that is asymptotically quasi-optimal in both bits stored and exchanged, at the cost of more computation on the server.
Keywords:
Usable security • Passwords • Discrete logarithm
Session Chair
Xhafer Krasniqi
Session Co-Chair
Driart Elshani
Proceedings Editor
Edmond Hajrizi
ISBN
978-9951-550-19-2
First Page
5
Last Page
10
Location
Pristina, Kosovo
Start Date
26-10-2019 3:30 PM
End Date
26-10-2019 5:00 PM
DOI
10.33107/ubt-ic.2019.279
Recommended Citation
Blanchrad, Nikola K., "Password typo correction using discrete logarithms" (2019). UBT International Conference. 279.
https://knowledgecenter.ubt-uni.net/conference/2019/events/279
Included in
Password typo correction using discrete logarithms
Pristina, Kosovo
As passwords remain the main online authentication method, focus has shifted from naive entropy to how usability improvements can increase security. Chatterjee et al. recently introduced the first two typotolerant password checkers, which improve usability at no security cost but are technically complex. We look at the more general problem of computing an edit distance between two strings without having direct access to those strings — by storing the equivalent of a hash. We propose a simpler algorithm for this problem that is asymptotically quasi-optimal in both bits stored and exchanged, at the cost of more computation on the server.