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Erschienen in:
Integrity Checking of Function Pointers in Kernel Pools via Virtual Machine Introspection Kapitel lesen Erstes Kapitel lesen

2015 | OriginalPaper | Buchkapitel

On the Viability of CAPTCHAs for use in Telephony Systems: A Usability Field Study

verfasst von : Niharika Sachdeva, Nitesh Saxena, Ponnurangam Kumaraguru

Erschienen in: Information Security

Verlag: Springer International Publishing

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Abstract

Telephony systems are imperative for information exchange offering low cost services and reachability to millions of customers. They have not only benefited legitimate users but have also opened up a convenient communication medium for spammers. Voice spam is often encountered on telephony systems in various forms, such as by means of an automated telemarketing call asking to call a number to win a reward. A large percentage of voice spam is generated through automated system which introduces the classical challenge of distinguishing machines from humans on telephony systems. CAPTCHA is a conventional solution deployed on the web to address this problem. Audio-based CAPTCHAs have been proposed as a solution to curb voice spam. In this paper, we conducted a field study with 90 participants in order to answer two primary research questions: quantifying the amount of inconvenience telephony-based CAPTCHA may cause to users, and how various features of the CAPTCHA, such as duration and size, influence usability of telephony-based CAPTCHA. Our results suggest that currently proposed CAPTCHAs are far from usable, with very low solving accuracies, high solving times and poor overall user experience. We provide certain guidelines that may help improve existing CAPTCHAs for use in telephony systems.

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Vorheriges Kapitel Practical and Provably Secure Distance-Bounding
Nächstes Kapitel Cars, Condoms, and Facebook
Fußnoten
1
Softphone is an application that allows a desktop, laptop or workstation computer to work as a telephone via Voice over IP technology e.g. Skype.
 
4
FreeSWITCH is one of the open source telephony platforms which has enabled easy access to telephony often required by various businesses. http://​www.​freeswitch.​org/​/​.
 
6
Given that SUS is 68 for average usable system.http://​www.​measuringusabili​ty.​com/​sus.​php.
 
7
Are you human Captcha. Secure from All Angles, http://​areyouahuman.​com/​security/​.
 
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Metadaten
Titel
On the Viability of CAPTCHAs for use in Telephony Systems: A Usability Field Study
verfasst von
Niharika Sachdeva
Nitesh Saxena
Ponnurangam Kumaraguru
Copyright-Jahr
2015
Buch
Information Security

Print ISBN: 978-3-319-27658-8

Electronic ISBN: 978-3-319-27659-5

Copyright-Jahr: 2015

DOI
https://doi.org/10.1007/978-3-319-27659-5_19

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