스마트폰 터치 습관으로 이상거래 잡는다

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aria-label="https://zdnet.co.kr/view/?no=20221209081047" href="https://web.archive.org/web/20221209183156/https://twitter.com/intent/tweet?text=스마트폰 터치 습관으로 이상거래 잡는다&url=" target="_blank"><i class="icon-twitter"></i></a></li> <li class="linkedin"><a class="fb2-share" aria-label="http%3A%2F%2Fzdnet.co.kr%2Fview%2F%3Fno%3D20221209081047" href="https://web.archive.org/web/20221209183156/https://www.linkedin.com/shareArticle?url=" target="_blank"><i class="icon-linkedin"></i></a></li> <li><a href="javascript:increaseFontsize('20221209081047');"><img src="/web/20221209183156im_/https://zdnet.co.kr/images/txt_bt1.gif" alt=""></a></li> <li><a href="javascript:decreaseFontsize('20221209081047');"><img src="/web/20221209183156im_/https://zdnet.co.kr/images/txt_bt2.gif" alt=""></a></li> <li><a href="javascript:article_print('20221209081047')"><img src="/web/20221209183156im_/https://zdnet.co.kr/images/print_bt.gif" alt=""></a></li> </ul> </div> </div> </div>  <div class="cont_ad_box"> <iframe src="https://web.archive.org/web/20221209183156if_/https://adv.zdnet.co.kr/RealMedia/ads/adstream_sx.ads/zdnet.co.kr/zd@Position1" marginwidth="0" marginheight="0" scrolling="no" leftmargin="0" topmargin="0" width="700" height="20" frameborder="0"></iframe> </div>  <div class="view_cont" id="articleBody" itemprop="articleBody"> <div id="content-20221209081047" style="font-size: 16px;">  <div class="view_ad"> <iframe src="https://web.archive.org/web/20221209183156if_/https://adv.zdnet.co.kr/RealMedia/ads/adstream_sx.ads/zdnet.co.kr/zd@Left" width="210" height="210" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" leftmargin="0" topmargin="0"></iframe> </div> <p>우리가 모르는 스마트폰 터치 습관으로 금융 거래가 진짜 내가 한 거래인지 판단할 수 있다면 어떨까.</p> <p>인터넷전문은행 '카카오뱅크'는 개별 고객만이 지닌 터치 리듬과 패턴으로 이상 거래를 잡아내는 '무자각 인증' 기술을 9일 '이프(If) 카카오 2022'를 통해 소개했다.</p> <p>무자각 인증은 비밀번호나 패턴, OTP와 다르게 사용자가 인지하지 못한 상태서 이뤄지는 인증하는 기술로, 카카오뱅크는 무자각 인증으로 터치 습관을 활용하고 있다. 사용자는 알아채지 못하지만 카카오뱅크의 인증 비밀번호를 입력할 때 고객의 터치 습관을 통해 이 거래가 정상적으로 해당 사용자가 요청한 것인지를 확인하는 것이다.</p> <figure class="view_cont_img_jpg" style="width:638px; margin: 0 auto;"> <span class="img"><img src="https://web.archive.org/web/20221209183156im_/https://image.zdnet.co.kr/2022/12/09/50dce7c91c6ea3f2512c76ee951b3072.jpg" style="height:auto"></span> <figcaption style="text-align:left; line-height: 1.6;">카카오뱅크의 무지각 인증.</figcaption> </figure> <p>카카오뱅크 금융기술연구소 신동화 금융분석팀 매니저는 "인증 비밀번호를 입력했을 때 각 사용자 마다 입력 리듬을 이해하려고 했다"며 "터치 리듬이 비슷한 사용자를 구분하기 위해선 터치 압력과 위치, 스마트폰을 사용할 때의 기울기, 센서 값을 활용했다"고 설명했다.</p> <p>터치 습관을 통한 무지각 인증은 고령층을 대상으로 한 대출 사기 범죄를 줄일 수 있을 것으로 보인다. 신동화 매니저는 "사기꾼이 피해자의 스마트폰이나 신분증을 탈취해 계좌를 개설하고 대출을 실행하는 등의 행동을 회원 가입 직후 1일내 하는 비율이 41%"라며 "카카오뱅크가 터치 습관을 이용해 추론한 고객과 신분증 상 연령의 일치 여부를 알 수 있으면 사기를 막을 수 있을 것이라고 생각한다"고 귀띔했다.</p> <p>실제 카카오뱅크가 얻은 데이터를 분석해보면 사용자 마다 고유의 터치 리듬이 존재했다. 연령별로 주로 누르는 터치 위치가 다른데다가 성별에 따른 차이도 있다. 신 매니저는 "연령대가 높아질 수록 터치 시간 차가 증가하는 건 물론이고 50대 이상은 터치 입력이 한 곳에 모이는 것으로 확인됐다"며 "고연령층일 수록 스마트폰 사용이 익숙하지 않아 좀더 정확하게 치려는 경향이 있는 것 같았다"고 설명했다.</p> <figure class="view_cont_img_jpg" style="width:640px; margin: 0 auto;"> <span class="img"><img src="https://web.archive.org/web/20221209183156im_/https://image.zdnet.co.kr/2022/11/17/b7bd79c27a5c654c14b73558ab27f1db.jpg" style="height:auto"></span> <figcaption style="text-align:left; line-height: 1.6;">카카오뱅크 서울오피스</figcaption> </figure> <p>또 신 매니저는 "남성은 버튼의 좌측 하단을 주로 터치하고 여성은 버튼 우측 상단을 주로 눌렀는데 남성의 왼손잡이 비율이 높아서 생긴 결과 일 수 있다"고 부연했다.</p>  <h2><span>관련기사</span></h2> <div class="news_box connect"> <ul> <li><a href="/web/20221209183156/https://zdnet.co.kr/view/?no=20221209080429&re=R_20221209081047">10월 경상수지 8.8억달러 흑자...전년比 89%↓</a><span>2022.12.09</span></li> <li><a href="/web/20221209183156/https://zdnet.co.kr/view/?no=20221209080106&re=R_20221209081047">[미장브리핑] 나스닥 이번 주 3.31% 하락</a><span>2022.12.09</span></li> <li><a href="/web/20221209183156/https://zdnet.co.kr/view/?no=20221208150758&re=R_20221209081047">진옥동 신한금융 회장 내정자 "신뢰 회복이 최우선 과제"</a><span>2022.12.08</span></li> <li><a href="/web/20221209183156/https://zdnet.co.kr/view/?no=20221208140541&re=R_20221209081047">애플페이 원하는 저신용자...'SC제일은행' 웃을까</a><span>2022.12.08</span></li> </ul> </div> <p>카카오뱅크는 무지각 인증에 대한 데이터 분석 결과를 바탕으로 75개의 파생 변수를 생성했다. 이를 사용자가 50대 이상인지 아닌지 분류하는 모형과 사용자 인증 모형 두 가지를 만들어 이상 거래 탐지를 보완하고 있다.</p> <p>신동화 매니저는 "터치 습관을 이용한 무자각 인증 금융취약계층 등이 불편함 없이 안전하게 카카오뱅크를 이용했으면 좋겠다"고 말했다.</p> <div class="mt_bn_box">  <script type="text/javascript" src="https://web.archive.org/web/20221209183156js_/https://ads.mtgroup.kr/RealMedia/ads/adstream_jx.ads/zdnet_pc/news@Frame1"></script> </div> </div> </div>  <div class="reporter_list2"> <div class="reporter_name"><strong>손희연 기자</strong><a href="https://web.archive.org/web/20221209183156/mailto:kunst@zdnet.co.kr">kunst@zdnet.co.kr</a></div> <div class="reporter_btn"><a href="/web/20221209183156/https://zdnet.co.kr/reporter/?lstcode=kunst">기자의 다른 기사 보기 <i class="icon-chevron-circle-right"></i></a></div> </div>  <div class="like_box"> <iframe 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스마트폰 터치 습관으로 이상거래 잡는다 - ZDNet korea