• MALSORI
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• no.46
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• pp.25-35
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• 2003

This study deals with the disguised voice (or voice disguise) in the field of forensic phonetics. We especially studied the effects of the methods of disguised voice on the aural decision. Within the nonelectronic-deliberate voice disguise area, the methods of disguised voice include use of lowered pitch, pinched nostrils, falsetto, and whisper. Ten (male:5, female:5) Seoul speakers made a recording of 16 sentences. In the aural test, 30 subjects listened normal and disguised voice. And they were asked to make a decision whether speakers identified or not. The result is as follows: The speaker verification of the falsetto and whisper was more difficult than the lowered pitch and pinched nostrils.

• Proceedings of the KSPS conference
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• 2003.05a
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• pp.191-195
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• 2003

The aim of this paper is to analyze the phonetic features for disguised voice. In this paper we examined the features such as phonation types, pitch range, speech rate, intonation type and boundary tones etc. So the result of the analysis is as follows. : $\circled1$ Phonation types are very important manner of disguised voice for male subjects. $\circled2$ Pitch range and average of pitch value is very important cue for speaker verification. $\circled3$ pitch contour, speech rate and boundary tones can be a secondary cue for speaker verification.

• MALSORI
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• no.51
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• pp.1-16
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• 2004

The aim of this paper is to analyze vowels in voice imitation and disguised voice, and to find the invariable phonetic features of the speaker. In this paper we examined the formants of monophthongs /a, u, i, o, {$\omega},{\;}{\varepsilon},{\;}{\Lambda}$/. The results of the present are as follows : $\circled1$ Speakers change their vocal tract features. $\circled2$ Vowels /a, ${\varepsilon}$, i/ appear to be proper for speaker recognition since they show invariable acoustic feature during voice modulation. $\circled3$ F1 does not change easily compared to higher formants. $\circled4$ F3-F2 appears to be constituent for a speaker identification in vowel /a/ and /$\varepsilon$/, and F4-F2 in vowel /i/. $\circled5$ Resulting of F-ratio, differences of each formants were more useful than individual formant of a vowel to speaker recognition.

• Proceedings of the KSPS conference
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• 2004.05a
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• pp.215-218
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• 2004

The aim of this paper is to analyze the acoustic features for disguised voice. In this paper we examined the features such as pitch range, vowel formants(F1, F2, F3, F4). So the result of the analysis is as follows. : (1) Pitch range and average of pitch value is very important cue for speaker verification. (2) F3-F2 is also important cue for speaker verification (3) /a/ is more verified than other vowels.

• KSCI Review
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• v.14 no.2
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• pp.255-262
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• 2006

A Malicious code is used to SMiShing disguised as finance mobile Vishing, using Phishing, Pharming mail, VoIP service etc. to capture of personal information. A Malicious code deletes in Anti-Virus Spyware removal programs. or to cure use. By the way, the Malicious cord which is parasitic as use a DLL Injection technique, and operate are Isass.exe, winlogon.exe. csrss.exe of the window operating system. Be connected to the process that you shall be certainly performed of an exe back, and a treatment does not work. A user forces voluntarily a process, and rebooting occurs, or a blue screen occurs, and Compulsory end, operating system everyone does. Propose a treatment way like a bird curing a bad voice code to use a DLL Injection technique to occur in these fatal results. Click KILL DLL since insert voluntarily an end function to Thread for a new treatment, and Injection did again the Thread which finish an action of DLL, and an end function has as control Thread, and delete. The cornerstone that the treatment way that experimented on at these papers and a plan to solve will become a researcher or the revolutionary dimension that faced of a computer virus, and strengthen economic financial company meeting Ubiquitous Security will become.

• Journal of the Korea Society of Computer and Information
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• v.11 no.5 s.43
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• pp.251-258
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• 2006

A Malicious code is used to SMiShing disguised as finance mobile Vishing, using Phishing, Pharming mail, VoIP service etc. to capture of personal information. A Malicious code deletes in Anti-Virus Spyware removal programs, or to cure use. By the way, the Malicious cord which is parasitic as use a DLL Injection technique, and operate are Isass.exe, winlogon.exe, csrss.exe of the window operating system. Be connected to the process that you shall be certainly performed of an exe back, and a treatment does not work. A user forces voluntarily a process, and rebooting occurs, or a blue screen occurs, and Compulsory end, operating system everyone does. Propose a treatment way like a bird curing a bad voice code to use a DLL Injection technique to occur in these fatal results. Click KILL DLL since insert voluntarily an end function to Thread for a new treatment, and Injection did again the Thread which finish an action of DLL, and an end function has as control Thread, and delete. The cornerstone that the treatment wav that experimented on at these papers and a plan to solve will become a researcher of the revolutionary dimension that faced of a computer virus, and strengthen economic financial company meeting Ubiquitous Security will become.