• 정보보호학회논문지
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• 제34권4호
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• pp.651-666
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• 2024

안드로이드 디바이스는 다양한 인증 방식을 제공하는 잠금 화면으로 사용자 데이터를 보호한다. 그러나 잠금 화면이 활성화된 상태에서도 Android Debug Bridge(ADB)를 통해 디바이스에 접근할 수 있다. 본 연구에서는 ADB의 특성을 활용하여 잠금 화면 보안 메커니즘을 우회할 수 있는 방법을 탐색하고자 한다. 이를 위해 ADB 명령어를 분석하고, 잠금 화면 보안을 무력화할 수 있는 명령어 조합을 자동으로 탐색하는 퍼징 테스트 도구인 LockPickFuzzer를 제안한다. LockPickFuzzer의 성능을 평가하기 위해 안드로이드 14를 탑재한 갤럭시 S23과 픽셀 8을 대상으로 실험을 진행하였다. 실험 결과, 잠금 화면의 인증 정보를 탈취하거나 우회할 수 있는 두 가지 ADB 명령 조합을 발견하였다. 이 발견된 취약점에 대해 삼성 보안팀에 리포트를 제출하였고, 한 가지 ADB 명령어 조합에 대해 삼성전자에서 공식적으로 인정받았다 (SVE-2023-1344). LockPickFuzzer는 자동으로 작동하며, 안드로이드 디바이스에서 ADB 명령어 조합으로 인한 보안 취약점을 효과적으로 탐지하는 데 기여할 것으로 기대된다.

• 한국정밀공학회지
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• 제18권6호
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• pp.148-158
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• 2001

In this paper, Automatic Dynamic Balancer(ADB) was simulated and investigated to use at the high speed rotating chuck for the friction welding. In the limited computer simulations and experiments that have been presently carried out, several conclusions have been found. Above critical speed of the rotating system, ADB can balance the rotating disk. Therefore, it can be predicted that ADB can make an uniform flash during the friction welding.

• NEWSLETTER 전기공업
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• 97-21호통권190호
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• pp.18-26
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• 1997

• 한국농공학회지
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• 제22권2호
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• pp.8-24
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• 1980

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2002년도 추계학술대회 논문집
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• pp.61-64
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• 2002

In this study, It was designed and developed optimal rotary dressing system of centerless grinding using for ferrule machining. Dressing shaft's dropping is calculated by Finite Element Method, and bearing 7206ADB, 7005ADB is selected. Dressing wheel $GC\Box \;200\Box\; G\Box\; m\Box\; V-100^*25^*16$ is selected by pre-research. Also Motor, pulley, belt are selected, 0.4Kw-60Hz, 48.2 mm diameter, 2-5M-730 type, each.

• NEWSLETTER 전기공업
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• 91-5호통권18호
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• pp.1-20
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• 1991

• NEWSLETTER 전기공업
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• 99-24호통권241호
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• pp.10-20
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• 1999

• 전기산업
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• 제8권6호
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• pp.99-105
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• 1997

• 전기산업
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• 제7권4호
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• pp.103-107
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• 1996

• Archives of Plastic Surgery
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• 제48권5호
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• pp.534-542
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• 2021

Background During the early stages of lymphedema, active physiologic surgical treatment can be applied. However, lymphedema patients often have limited knowledge and misconceptions regarding lymphedema and surgical treatment. We analyzed the correlations between lymphedema severity and surgical technique according to patients' awareness of surgical treatment for secondary upper extremity lymphedema (UEL). Methods Patients with UEL diagnosed between December 2017 and December 2019 were retrospectively evaluated. At the time of their presentation to our hospital for the treatment of lymphedema, they were administered a questionnaire about lymphedema and lymphedema surgery. Based on the results, patients were classified as being aware or unaware of surgical treatment. Lymphedema severity was classified according to the arm dermal backflow (ADB) stage and the MD Anderson Cancer Center (MDACC) stage based on indocyanine green lymphography conducted at presentation. Surgical techniques were compared between the two groups. Results Patients who were aware of surgical treatment had significantly lower initial ADB and MDACC stages (P<0.05) and more frequently underwent physiologic procedures than excisional procedures (P=0.003). Conclusions If patients are actively educated regarding surgical treatment of lymphedema, physiologic procedures may be performed during the early stages of UEL.