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ÇѱÛÁ¦¸ñ(Korean Title) MySQL InnoDBÀÇ »èÁ¦µÈ ·¹ÄÚµå º¹±¸ ±â¹ý °³¼±¹æ¾È¿¡ °üÇÑ ¿¬±¸
¿µ¹®Á¦¸ñ(English Title) A Study on the Improvement Method of Deleted Record Recovery in MySQL InnoDB
ÀúÀÚ(Author) Á¤¼º±Õ   ÀåÁö¿ø   Á¤µÎ¿ø   ÀÌ»óÁø   Jung Sung Kyun   Jee Won Jang   Doo Won Jeoung   Sang Jin Lee  
¿ø¹®¼ö·Ïó(Citation) VOL 06 NO. 12 PP. 0487 ~ 0496 (2017. 12)
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(Korean Abstract)
MySQL InnoDB¿¡¼­´Â µ¥ÀÌÅ͸¦ ±â·ÏÇÒ ¶§, Å×ÀÌºí¸¶´Ù Å×ÀÌºí½ºÆäÀ̽º¸¦ ºÐÇÒ »ý¼ºÇÏ¿© °³º°ÀûÀ¸·Î ÀúÀåÇÏ´Â ¹æ¹ý°ú ¸ðµç Å×ÀÌºí ¹× À妽º Á¤º¸¸¦ ´ÜÀÏ ½Ã½ºÅÛ Å×ÀÌºí½ºÆäÀ̽º¿¡ ÀúÀåÇÏ´Â ¹æ¹ýÀÌ ÀÖ´Ù. ±×¸®°í ÀÌ·¸°Ô ±â·ÏµÈ Á¤º¸µéÀ» ÀÌ¿ëÇØ »èÁ¦µÈ µ¥ÀÌÅ͸¦ ·¹ÄÚµå ´ÜÀ§·Î º¹±¸ÇÏ´Â °ÍÀÌ °¡´ÉÇÏ´Ù. ÇÏÁö¸¸ ÇöÀç ÁøÇàµÈ ´ëºÎºÐÀÇ µ¥ÀÌÅͺ£À̽º Æ÷·»½Ä ¿¬±¸¿¡¼­ ÀüÀÚÀÇ °æ¿ì´Â ¿¬±¸°¡ È°¹ßÇÏ°Ô ÀÌ·ç¾îÁ® ±× ±¸Á¶¿¡ ´ëÇÑ ºÐ¼®ÀÌ ¸¹ÀÌ ÀÌ·ç¾îÁ³Áö¸¸, ÈÄÀÚ¿¡ ´ëÇؼ­´Â ¾ÆÁ÷ °ø°³µÈ Á¤º¸°¡ Æ÷·»½Ä¿¡ È°¿ëµÇ±â¿£ ÃæºÐÄ¡ ¾Ê´Ù. À§ÀÇ µÎ ¹æ½ÄÀº °¢°¢ÀÇ ÀúÀ屸Á¶°¡ ¼­·Î ´Ù¸£±â ¶§¹®¿¡ µ¥ÀÌÅͺ£À̽º Æ÷·»½Ä °üÁ¡¿¡¼­ º»´Ù¸é µÑ ¸ðµÎ¿¡ ´ëÇÑ ºÐ¼®ÀÌ ÀÌ·ç¾îÁ®¾ß ÇÑ´Ù. º» ³í¹®¿¡¼­´Â ´ÜÀÏ ½Ã½ºÅÛ Å×ÀÌºí½ºÆäÀ̽ºÀÎ IBDATA ÆÄÀÏ¿¡ ·¹Äڵ带 ÀúÀåÇÏ´Â ¹æ½Ä¿¡¼­ÀÇ »èÁ¦µÈ ·¹ÄÚµå º¹±¸ ¹æ¹ýÀ» Á¦½ÃÇÑ´Ù. IBDATA ÆÄÀÏÀ» ºÐ¼®ÇÏ¿© ±× ±¸Á¶¸¦ ¹àÈ÷°í À̸¦ È°¿ëÇÏ¿© ±âÁ¸¿¡ °í·ÁµÇÁö ¾Ê¾Ò´ø ¹ÌÇÒ´ç ÆäÀÌÁö ¿µ¿ª±îÁö È®ÀåÇÑ »èÁ¦ ·¹ÄÚµå º¹±¸ ¾Ë°í¸®ÁòÀ» ¼Ò°³ÇÑ´Ù. ¶ÇÇÑ, ¾Ë°í¸®Áò À» µµ±¸·Î ±¸ÇöÇÏ¿© ½ÇÁ¦ µ¥ÀÌÅ͸¦ ÀÌ¿ëÇÑ °ËÁõÀ» ÅëÇØ ±âÁ¸ ¹æ¹ýº¸´Ù º¹±¸À²ÀÌ 68%±îÁö Çâ»óµÇ¾úÀ½À» º¸ÀδÙ.
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(English Abstract)
In MySQL InnoDB, there are two ways of storing data. One is to create a separate tablespace for each table and store it separately. Another is to store all table and index information in a single system tablespace. You can use this information to recover deleted data from the record. However, in most of the current database forensic studies, the former is actively researched and its structure is analyzed, whereas the latter is not enough to be used for forensics. Both approaches must be analyzed in terms of database forensics because their storage structures are different from each other. In this paper, we propose a method for recovering deleted records in a method of storing records in IBDATA file, which is a single system tablespace. First, we analyze the IBDATA file to reveal its structure. And introduce delete record recovery algorithm which extended to an unallocated page area which was not considered in the past. In addition, we show that the recovery rate is improved up to 68% compared with the existing method through verification using real data by implementing the algorithm as a tool.
Å°¿öµå(Keyword) Database Forensic   MySQL InnoDB   File-Per-Table   IBDATA   Record Recovery  
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