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안드로이드 오픈마켓_보안이슈
 

안드로이드 오픈마켓_보안이슈

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Global Community Summit 2012의 안드로이드 오픈마켓의 보안이슈

Global Community Summit 2012의 안드로이드 오픈마켓의 보안이슈

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    안드로이드 오픈마켓_보안이슈 안드로이드 오픈마켓_보안이슈 Presentation Transcript

    • Android Open Market Place 보안이슈 SK플래닛 Client SW Dev.최정필( jungpil.choi@sk.com)
    • Good News(1/2)• More Apps, More Downloads• More Revenue – Android Market 매출 800% 향상(2010/2009)
    • Good News(2/2)• Tstore – 1400만 사용자 – 월 100억 거래 – 누적 거래 1천억 – 일 다운로드 100만건 – 게임매출: 75~80%• Samsung/Pantech/Nstore…
    • Bad News!(1/2)• 낮은 구매율 – Apple App Store에 비해 낮은 유료 사용자 • 29% 유료앱 구매경험(국내, android) – 높은 부분유료화(IAB)
    • Bad News!(2/2)• More Problems – 무단복제(Copy Right) – 권한도용(Payment Issues) – Malicious Code • Send SMS • Collect IMEI numbers
    • Why Android?(1/3)• Open Source/Open Market – Open : ‘mkdir android ; cd android ; repo init -u git://android.git.kernel.org/platform/manifest.git ; repo sync ; make’ – Rooting: 시스템의 모든 권한을 갖는다 • One Click Rooting – Custom ROM • 온라인뱅킹이 지원될 정도로 대중화 -_-; • 폰의 모든 정보를 믿을수 없다 – IP/MDN/IMEI/MAC
    • Why Android?(2/3)• Java – Bytecode: easy to understand – Cost(disassembly) >> Cost(decompile) – 전통적인 자바의 특징 • Mocha(1996) – For android • dex2jar : dex  jar  java (JD-GUI) • smali/baksmali: dex  smali  dex
    • Why Android?(3/3)• Android System itself – Dalvik VM executes dex files – Odex File: optimized dex file dex file Dalvik Virtual odex file Machine Storage (JIT Compiler) (reuse) decompile hijacking
    • OMPs ARM• Application Rights Management – Google: LVL(License Verification Library) – Amazon: DRM
    • OMPs ARM• Bypass-attack
    • OMPs ARM
    • In-app Billing Secure• Items could be faked by Bytecode Modification – Apple: IAP Cracker Preview제거 Item 획득 Level Up
    • How To Defense?• Use Obfuscator• Use Native Code• Use Your own item server• Sorry, Find your own solutions! – 2011 Google I/O Evading Pirates and Stopping Vampires using License Verification Library, In-App Billing, and App Engine – 2012.4 Code Obfuscation for the Amazon In-App
    • Conclusion• Current Android OMPs are not secure• Developer should handle it by him/herself• OMPs will do efforts – TStore will be enhanced soon! – Google? • 비즈니스 인사이더는 구글이 구글 플레이 결제방식을 개선하는 것을 검토 중이라고 전했다. … 결제방식 개선 은 전체 안드로이드 생태계를 책임지는 전략이 될 것으 로 보인다. 구체적인 방법은 알려지지 않았지만…