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Ç¥ÁعøÈ£ [ÆóÁö] TTAS.KO-06.0086 ±¸Ç¥ÁعøÈ£
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ÇѱÛÇ¥Áظí IAPP¿¡¼­ÀÇ ½ºÅ×ÀÌ¼Ç º¸¾È ÄÜÅؽºÆ®
¿µ¹®Ç¥Áظí Station Security Context in IAPP
Çѱ۳»¿ë¿ä¾à IAPP(Inter-Access Point Protocol)´Â ¹«¼±·£ ½Ã½ºÅÛ¿¡¼­ ºÐ»ê ½Ã½ºÅÛ(Distributed System)¸¦ ÅëÇÏ¿© ¾×¼¼½ºÆ÷ÀÎÆ® »çÀÌ¿¡ ÄÜÅؽºÆ®¸¦ ±³È¯ÇÏ´Â ÇÁ·ÎÅäÄÝÀÌ´Ù. º» ±Ô°ÝÀº ½ºÅ×À̼ÇÀÌ ¾×¼¼½ºÆ÷ÀÎÆ®¿ÍÀÇ º¸¾ÈÇù»ó¿¡¼­ ¸¸µé¾îÁø PMK(Pairwise Master Key) Á¤º¸¸¦ ¾×¼¼½ºÆ÷ÀÎÆ® »çÀÌ¿¡ ±³È¯Çϱâ À§ÇÑ ½ºÅ×ÀÌ¼Ç º¸¾È ÄÜÅؽºÆ®¸¦ Á¤ÀÇÇÑ´Ù. ½ºÅ×ÀÌ¼Ç º¸¾È ÄÜÅؽºÆ®´Â IAPP À̵¿-ÀÀ´ä ÆÐŶ ¶Ç´Â IAPP ij½Ã-ÅëÁö ÆÐŶÀÇ ÄÜÅؽºÆ®·Î Àü´ÞµÉ ¼ö ÀÖ´Ù. º¸¾È ÄÜÅؽºÆ®ÀÇ Á¤º¸¿ä¼Ò·Î PMK º¸¾È ÄÜÅؽºÆ®, PMKID º¸¾È ÄÜÅؽºÆ®, À¯È¿±â°£ º¸¾È ÄÜÅؽºÆ®°¡ Æ÷ÇԵȴÙ.
AP°¡ ±³È¯µÈPMK Á¤º¸¸¦ ij½ÃÇÏ°í, ½ºÅ×À̼ÇÀÌ ÀÌÀü AP¿¡¼­ »ç¿ëÇÑ Å°ÀÇ ½Äº°ÀÚ(KeyID)¸¦ »ç¿ëÇÏ¿© ÀçÁ¢¼Ó ¿äû(Reassociation Request)Çϸé, AP´Â ij½ÃµÈ PMK¸¦ »ç¿ëÇÏ¿© ÀÎÁõ°úÁ¤À» »ý·«ÇÏ°í Å° ±³È¯À» ¼öÇàÇÑ´Ù.
¿µ¹®³»¿ë¿ä¾à IAPP(Inter-Access Point Protocol) is a protocol to communicate contexts between AP(Access Point)s in a Distributed System of Wireless LAN. This standard standardizes Station Security Context to communicate the PMK(Pairwise Master Key) which are made by the authentication procedure of a station and an AP. Station Security Context is transferred as a context of a IAPP-Move-Response packet or a IAPP-Cache-Notify packet. Station Security Context contains PMK, PMKID, and Validity Term as information elements.
When a station requests reassociation with the key ID of the old association, if the AP has the cached PMK, the AP and the station can exchange keys using the cached PMK omitting the authentication procedure.
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