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Audio CAPTCHA Techniques: A Review | SpringerLink

    https://link.springer.com/chapter/10.1007%2F978-981-10-8228-3_33
    Abstract. Audio CAPTCHA is a reverse Turing test to discriminate the user as human or bot using audio as a medium. As W3C guidelines mandate the need of accessibility of web for people with disabilities like visual or motor impairment, audio CAPTCHA is an essential form of CAPTCHA for web security.

Audio CAPTCHA: Usable Accessibility + Usable Security

    http://assistech.iitd.ac.in/empower2018/abstracts/Audio%20CAPTCHA.pdf
    Audio CAPTCHA: Usable Accessibility + Usable Security Abstract Visual CAPTCHAs are designed to be unreadable by machine, hence, are inaccessible to assistive technology users. Traditional Audio CAPTCHAs are theoretically accessible to visually impaired (VI) users but are often hard to solve with low success rate, i.e., below 50% and ...

Audio CAPTCHA: Existing solutions assessment and a …

    https://seminars4you.wordpress.com/2010/10/29/audio-captcha-existing-solutions-assessment-and-a-new-implementation-for-voip-telephony/
    ABSTRACT SPam over Internet Telephony (SPIT) is a potential source of future annoyance in Voice over IP (VoIP) systems. A typical way to launch a SPIT attack is the use of an automated procedure (i.e., bot), which generates calls and produces unsolicited audio messages. A known way to protect against SPAM is a Reverse Turing…

Exploring Adversaries to Defend Audio CAPTCHA | IEEE ...

    https://ieeexplore.ieee.org/document/8999236
    Exploring Adversaries to Defend Audio CAPTCHA. Abstract: CAPTCHA is a web-based authentication method used by websites to distinguish between humans (valid users) and bots (attackers). Audio captcha is an accessible captcha meant for the visually disabled section of users such as color-blind, blind, near-sighted users.

A non-speech audio CAPTCHA based on acoustic event ...

    https://ieeexplore.ieee.org/document/7760649/
    Abstract: The completely automated public Turing test to tell computers and humans apart (CAPTCHA) represents an established method to prevent automated abuse of web services. Most websites provide an audio CAPTCHA - in addition to a conventional visual scheme - to facilitate access for a wider range of users.

Audio-CAPTCHA with distinction between random phoneme ...

    https://meiji.elsevierpure.com/en/publications/audio-captcha-with-distinction-between-random-phoneme-sequences-a
    Abstract Audio-CAPTCHA prevents malicious bots from attacking Web services and provides Web accessibility for visually-impaired persons. Most of the conventional methods employ statistical noise to distort sounds and let users remember and spell the words, which are difficult and laborious work for humans.

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