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¿µ¹® Ç¥Áظí Tampering Detection Method Using Attribute Information of MPEG-4 Video
ÇÑ±Û ³»¿ë¿ä¾à º» Ç¥ÁØÀº ¿µ»ó À§º¯Á¶ ÆÇ´ÜÀ» À§ÇØ ¸ÞŸµ¥ÀÌÅÍ, ±¸Á¶Á¤º¸, ÇüÅÂÁ¤º¸¸¦ Áß½ÉÀ¸·Î ±â¼úÀû ºÐ¼® ¹æ¹ý°ú ÀýÂ÷¸¦ Á¤ÀÇÇÑ´Ù. ¸ÞŸµ¥ÀÌÅÍ´Â »ý¼º½Ã°£, ÆÄÀϸí, Æ÷¸Ë µî º¯°æ °¡´É¼ºÀÌ ³ôÀº Á¤º¸¸¦ Æ÷ÇÔÇÑ´Ù. ±¸Á¶Á¤º¸´Â ¿µ»ó ÆÄÀÏÀÇ ÄÁÅ×À̳Ê(¿¹: MP4ÀÇ ftyp, moov, mdat µî)¿Í ¹Ú½º °ª¡¤¼ø¼­¸¦ ºÐ¼®ÇÏ¿© ¾ÖÇø®ÄÉÀ̼Ǻ° Ư¼º°ú À§º¯Á¶ ¿©ºÎ¸¦ ½Äº°ÇÑ´Ù. ÇüÅÂÁ¤º¸´Â GOP ±¸Á¶¿Í SPS/PPS °ªÀ» ÅëÇØ ÇÁ·¹ÀÓ ÆÐÅÏÀÇ ÀÌ»ó ¿©ºÎ¸¦ ÆÇ´ÜÇϸç ÀÎÄÚµù ¹æ½ÄÀÇ Â÷À̸¦ ÀÌ¿ëÇØ À§º¯Á¶ ¿©ºÎ¸¦ È®ÀÎÇÑ´Ù.
¿µ¹® ³»¿ë¿ä¾à This standard defines technical analysis methods and procedures for detecting video tampering. It focuses on metadata, structural information, and frame information. Metadata includes information that is highly likely to be altered, such as the creation time, file name, and format. Structural information involves analyzing the video file container (e.g., MP4's ftyp, moov, and mdat) and the order and values of boxes to identify application-specific characteristics and detect tampering. Frame information examines GOP structures and SPS/PPS values to detect anomalies in frame patterns and verify tampering by leveraging differences in encoding methods.
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