Side-channel attack against the capy HIP. Hernández-Castro, C., R-Moreno, M., & Barrero, D. In Proceedings - 2014 International Conference on Emerging Security Technologies, EST 2014, 2014. abstract bibtex © 2014 IEEE. One of the first approaches to proposed to prevent automated attacks on Internet were the Human Interactive Proofs (HIPs). Since their invention, a variety of designs have been proposed, yet most of them have been successfully attacked. In this paper we focus on a new HIP, based on a puzzle solving scheme, created to increase both security and usability: the Capy CAPTCHA. We have analyzed its design, finding some important flaws. Based on them, we propose a low-cost, side-channel attack. Initial results show that the attack is able to break Capy with a 61% success ratio.
@inProceedings{
title = {Side-channel attack against the capy HIP},
type = {inProceedings},
year = {2014},
identifiers = {[object Object]},
keywords = {CAPTCHA,Capy,HIP,JPEG,attack,low-cost,side-channel},
id = {4c3b6ba7-33cc-3fb7-ad4d-78235397288b},
created = {2019-03-18T15:00:28.751Z},
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profile_id = {77ead516-4fb7-3189-a920-09efa515b9dd},
last_modified = {2019-03-18T15:00:28.751Z},
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abstract = {© 2014 IEEE. One of the first approaches to proposed to prevent automated attacks on Internet were the Human Interactive Proofs (HIPs). Since their invention, a variety of designs have been proposed, yet most of them have been successfully attacked. In this paper we focus on a new HIP, based on a puzzle solving scheme, created to increase both security and usability: the Capy CAPTCHA. We have analyzed its design, finding some important flaws. Based on them, we propose a low-cost, side-channel attack. Initial results show that the attack is able to break Capy with a 61% success ratio.},
bibtype = {inProceedings},
author = {Hernández-Castro, C.J. and R-Moreno, M.D. and Barrero, D.F.},
booktitle = {Proceedings - 2014 International Conference on Emerging Security Technologies, EST 2014}
}
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