ã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã®å æ¬çãªè§£èª¬ãæå·æè¡ãžã®åœ±é¿ããããŠäžçã®ãµã€ããŒã»ãã¥ãªãã£ãšéåã³ã³ãã¥ãŒãã£ã³ã°ã«å¯Ÿããå°æ¥çãªæå³åãã«ã€ããŠèª¬æããŸãã
éåã¢ã«ãŽãªãºã ïŒã·ã§ã¢ã®ã¢ã«ãŽãªãºã 解説
ã³ã³ãã¥ãŒãã£ã³ã°ã®äžçã¯é©åœçãªå€åãéããŠããããã®å€é©ã®äžå¿ã«ããã®ãéåã³ã³ãã¥ãŒãã£ã³ã°ã§ãããŸã åææ®µéã«ãããŸãããéåã³ã³ãã¥ãŒãã£ã³ã°ã¯æã匷åãªå€å žã³ã³ãã¥ãŒã¿ã§ã解決äžå¯èœãªè€éãªåé¡ã解決ãããšæåŸ ãããŠããŸããéçºãããŠããå€ãã®éåã¢ã«ãŽãªãºã ã®äžã§ããã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã¯æå·æè¡ãšãµã€ããŒã»ãã¥ãªãã£ã«æ·±å»ãªåœ±é¿ãäžããç»æçãªææãšããŠéç«ã£ãŠããŸãããã®å æ¬çãªã¬ã€ãã¯ãã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã詳现ã«è§£èª¬ãããã®ä»çµã¿ã圱é¿ããããŠäžçäžã®èªè ã«åããå°æ¥ã®å±æãæ¢ãããšãç®çãšããŠããŸãã
éåã³ã³ãã¥ãŒãã£ã³ã°å ¥é
ç§ãã¡ã®æ¥åžžçãªããã€ã¹ãåãããŠããå€å žã³ã³ãã¥ãŒã¿ã¯ã0ã1ã®ããããã衚ããããã䜿çšããŠæ å ±ãä¿åã»åŠçããŸããäžæ¹ãéåã³ã³ãã¥ãŒã¿ã¯éåååŠã®åçãæŽ»çšããŠãéåããããçšããŠæ å ±ãæäœããŸããããããšã¯ç°ãªããéåãããã¯0ãš1ã®äž¡æ¹ã®ç¶æ ãåæã«éãåããã§ååšã§ãããããæ ¹æ¬çã«ç°ãªãæ¹æ³ã§èšç®ãå®è¡ã§ããŸãã
éåã³ã³ãã¥ãŒãã£ã³ã°ã®äž»èŠãªæŠå¿µã«ã¯ã以äžã®ãã®ããããŸãïŒ
- éãåããïŒ éåãããã¯ã0ãš1ã®ç¶æ ã®çµã¿åããã§åæã«ååšã§ããŸããããã¯æ°åŠçã«Î±|0â© + β|1â©ãšè¡šãããαãšÎ²ã¯è€çŽ æ°ã§ãã
- ãšã³ã¿ã³ã°ã«ã¡ã³ãïŒéåãã€ãïŒïŒ 2ã€ä»¥äžã®éåãããããšã³ã¿ã³ã°ã«ã¡ã³ãç¶æ ã«ãããšãããããã®éåœã¯çžäºã«çµã³ã€ããŠããŸããäžæ¹ã®ãšã³ã¿ã³ã°ã«ããéåãããã®ç¶æ ãæž¬å®ãããšãããããéãŠãè·é¢ã«é¢ä¿ãªããããäžæ¹ã®ç¶æ ã«é¢ããæ å ±ãå³åº§ã«æããã«ãªããŸãã
- éåã²ãŒãïŒ ãããã¯éååè·¯ã®åºæ¬çãªæ§æèŠçŽ ã§ãããå€å žã³ã³ãã¥ãŒã¿ã®è«çã²ãŒãã«çžåœããŸããéåãããã®ç¶æ ãæäœããŠèšç®ãå®è¡ããŸããäŸãšããŠãã¢ãããŒã«ã²ãŒãïŒHã²ãŒãïŒãCNOTã²ãŒããå転ã²ãŒããªã©ããããŸãã
ã·ã§ã¢ã®ã¢ã«ãŽãªãºã ãšã¯ïŒ
1994å¹Žã«æ°åŠè ããŒã¿ãŒã»ã·ã§ã¢ã«ãã£ãŠéçºãããã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã¯ã倧ããªæŽæ°ãå¹ççã«å æ°åè§£ããããã«èšèšãããéåã¢ã«ãŽãªãºã ã§ãã倧ããªæ°ãå æ°åè§£ããããšã¯ãå€å žã³ã³ãã¥ãŒã¿ã«ãšã£ãŠèšç®äžå°é£ãªåé¡ã§ãããç¹ã«æ°ã®ãµã€ãºã倧ãããªãã«ã€ããŠãã®é£æåºŠã¯å¢ããŸãããã®å°é£ãããç§ãã¡ã®ãªã³ã©ã€ã³éä¿¡ãããŒã¿äŒéã®å€ããä¿è·ããŠããRSAïŒãªãã¹ãã»ã·ã£ãã¢ã»ã¢ãã«ãã³ïŒã®ãããªåºã䜿çšãããŠããå€ãã®æå·åã¢ã«ãŽãªãºã ã®åºç€ãšãªã£ãŠããŸãã
ã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã¯ãæãããç¥ãããŠããå€å žçãªå æ°åè§£ã¢ã«ãŽãªãºã ãããææ°é¢æ°çãªé«éåãå®çŸããŸããããã¯ãã©ããªå€å žã³ã³ãã¥ãŒã¿ãããã¯ããã«éã倧ããªæ°ãå æ°åè§£ã§ããããšãæå³ããRSAããã®ä»é¡äŒŒã®æå·åæ¹åŒãè匱ã«ããŸãã
æŽæ°ã®å æ°åè§£åé¡
æŽæ°ã®å æ°åè§£ãšã¯ãåææ°ããã®çŽ å æ°ã«åè§£ããããã»ã¹ã§ããäŸãã°ã15ãšããæ°ã¯3 x 5ã«å æ°åè§£ã§ããŸããå°ããªæ°ã®å æ°åè§£ã¯ç°¡åã§ãããæ°ã®ãµã€ãºã倧ãããªãã«ã€ããŠé£æåºŠã¯åçã«å¢å ããŸããéåžžã«å€§ããªæ°ïŒæ°çŸãŸãã¯æ°åæ¡ïŒã®å Žåãå€å žã¢ã«ãŽãªãºã ã䜿çšããŠããããå æ°åè§£ããã®ã«å¿ èŠãªæéã¯æ³å€ã«é·ããªããæã匷åãªã¹ãŒããŒã³ã³ãã¥ãŒã¿ã䜿ã£ãŠãæ°åå幎ãããå¯èœæ§ããããŸãã
RSAã¯ã倧ããªæ°ã®å æ°åè§£ãèšç®äžå®è¡äžå¯èœã§ãããšããä»®å®ã«äŸåããŠããŸããRSAã®å ¬ééµã¯2ã€ã®å€§ããªçŽ æ°ããå°åºãããã·ã¹ãã ã®ã»ãã¥ãªãã£ã¯ãããã®çŽ æ°ã®ç©ãå æ°åè§£ããããšã®é£ããã«äŸåããŸããæ»æè ãå ¬ééµãå¹ççã«å æ°åè§£ã§ããã°ãç§å¯éµãå°ãåºããæå·åãããã¡ãã»ãŒãžã埩å·ã§ããŠããŸããŸãã
ã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã®ä»çµã¿ïŒã¹ããããã€ã¹ããã解説
ã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã¯ãå€å žèšç®ãšéåèšç®ãçµã¿åãããŠæŽæ°ãå¹ççã«å æ°åè§£ããŸããããã«ã¯ããã€ãã®äž»èŠãªã¹ããããå«ãŸããŸãïŒ
1. å€å žçãªååŠç
æåã®ã¹ãããã§ã¯ãåé¡ãåçŽåããããã«ããã€ãã®å€å žçãªååŠçãè¡ããŸãïŒ
- å æ°åè§£ãããæ°ãNãšãã1 < a < N ãšãªããããªã©ã³ãã ãªæŽæ° 'a' ãéžã³ãŸãã
- ãŠãŒã¯ãªããã®äºé€æ³ãçšã㊠'a' ãš N ã®æå€§å ¬çŽæ°ïŒGCDïŒãèšç®ããŸãããã GCD(a, N) > 1 ã§ããã°ãN ã®å æ°ãèŠã€ãã£ãããšã«ãªããŸãïŒãããŠçµäºã§ãïŒã
- ãã GCD(a, N) = 1 ã§ããã°ãã¢ã«ãŽãªãºã ã®éåçãªéšåã«é²ã¿ãŸãã
2. éåçãªåšæçºèŠ
ã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã®æ žå¿ã¯ãéåèšç®ãçšããŠé¢æ°ã®åšæãå¹ççã«èŠã€ããèœåã«ãããŸããåšæ 'r' ã¯ãar mod N = 1 ãšãªãæå°ã®æ£ã®æŽæ°ã§ãã
ãã®ã¹ãããã«ã¯ã以äžã®éåæäœãå«ãŸããŸãïŒ
- éåããŒãªãšå€æïŒQFTïŒïŒ QFTã¯ãå€å žçãªé¢æ£ããŒãªãšå€æã®éåçã§ããåšæé¢æ°ã®åšæãèŠã€ããããã®éèŠãªèŠçŽ ã§ãã
- ã¢ãžã¥ã©ã¹ãä¹ïŒ ããã¯ãéååè·¯ã䜿çšããŠæ§ã 㪠'x' ã®å€ã«å¯Ÿã㊠ax mod N ãèšç®ãããã®ã§ããããã¯ãäºä¹ã»ä¹ç®ãç¹°ãè¿ãææ³ãšã¢ãžã¥ã©ä¹ç®æè¡ãçšããŠå®è£ ãããŸãã
éåçãªåšæçºèŠã®ããã»ã¹ã¯æ¬¡ã®ããã«èŠçŽã§ããŸãïŒ
- å ¥åã¬ãžã¹ã¿ãšåºåã¬ãžã¹ã¿ã®éåããããæºåããïŒ å ¥åã¬ãžã¹ã¿ã¯æå㯠'x' ã®å šãŠã®å¯èœãªå€ã®éãåãããä¿æããåºåã¬ãžã¹ã¿ã¯æ¢ç¥ã®ç¶æ ïŒäŸïŒå šãŠãŒãïŒã«åæåãããŸãã
- ã¢ãžã¥ã©ã¹ã乿äœãé©çšããïŒ ax mod N ãèšç®ãããã®çµæãåºåã¬ãžã¹ã¿ã«æ ŒçŽããŸããããã«ãããå 'x' ã察å¿ãã ax mod N ãšé¢é£ä»ããããç¶æ ã®éãåãããçæãããŸãã
- å ¥åã¬ãžã¹ã¿ã«éåããŒãªãšå€æïŒQFTïŒãé©çšããïŒ ããã«ãããéãåãããåšæ 'r' ãæããã«ããç¶æ ã«å€æãããŸãã
- å ¥åã¬ãžã¹ã¿ã枬å®ããïŒ æž¬å®ã«ãã£ãŠåšæ 'r' ã«é¢é£ããå€ãåŸãããŸããéåæž¬å®ã®ç¢ºççãªæ§è³ªã®ããã'r' ã®æ£ç¢ºãªæšå®å€ãåŸãããã«ãã®ããã»ã¹ãè€æ°åç¹°ãè¿ãå¿ èŠãããå ŽåããããŸãã
3. å€å žçãªåŸåŠç
éåèšç®ããåšæ 'r' ã®æšå®å€ãåŸãåŸãå€å žçãªåŸåŠçãçšã㊠N ã®å æ°ãæœåºããŸãïŒ
- 'r' ãå¶æ°ã§ãããã確èªããŸãã'r' ã奿°ã®å Žåã¯ãã¹ããã1ã«æ»ããç°ãªãå€ã® 'a' ãéžã³ãŸãã
- 'r' ãå¶æ°ã®å Žåã以äžãèšç®ããŸãïŒ
- x = a(r/2) + 1 mod N
- y = a(r/2) - 1 mod N
- GCD(x, N) ãš GCD(y, N) ãèšç®ããŸããããã㯠N ã®éèªæãªå æ°ã§ããå¯èœæ§ãé«ãã§ãã
- ãã GCD(x, N) = 1 ãŸã㯠GCD(y, N) = 1 ã®å Žåãããã»ã¹ã¯å€±æã§ããã¹ããã1ã«æ»ããç°ãªãå€ã® 'a' ãéžã³ãŸãã
åŸåŠçã®ã¹ãããã§éèªæãªå æ°ãæåè£ã«åŸãããã°ãã¢ã«ãŽãªãºã 㯠N ã®å æ°åè§£ã«æåããããšã«ãªããŸãã
ãªãã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã¯æå·æè¡ãžã®è åšãªã®ã
RSAãé¡äŒŒã®æå·åã¢ã«ãŽãªãºã ãã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã«å¯ŸããŠè匱ã§ããããšã¯ãçŸä»£ã®æå·æè¡ã«é倧ãªè åšããããããŸãããã®åœ±é¿ã¯åºç¯å²ã«åã³ã以äžã«åœ±é¿ããŸãïŒ
- å®å šãªéä¿¡ïŒ éµäº€æã«RSAãå©çšããTLS/SSLã®ãããªå®å šãªéä¿¡ãããã³ã«ãè匱ã«ãªããŸããããã«ããããªã³ã©ã€ã³ååŒãé»åã¡ãŒã«ããã®ä»ã®æ©å¯ããŒã¿ã®æ©å¯æ§ãæãªãããŸãã
- ããŒã¿ã¹ãã¬ãŒãžïŒ RSAãé¡äŒŒã®ã¢ã«ãŽãªãºã ã§æå·åãããããŒã¿ã¯ãååã«åŒ·åãªéåã³ã³ãã¥ãŒã¿ã«ã¢ã¯ã»ã¹ã§ããæ»æè ã«ãã£ãŠåŸ©å·ãããå¯èœæ§ããããŸããããã«ã¯ãããŒã¿ããŒã¹ãã¯ã©ãŠãã¹ãã¬ãŒãžãå人ããã€ã¹ã«ä¿åãããŠããæ©å¯æ å ±ãå«ãŸããŸãã
- ããžã¿ã«çœ²åïŒ ããžã¿ã«ææžã®çæ£æ§ãšå®å šæ§ãæ€èšŒããããã«äœ¿çšãããããžã¿ã«çœ²åã¯ãåºç€ãšãªãæå·åã¢ã«ãŽãªãºã ãç Žãããå Žåã«åœé ãããå¯èœæ§ããããŸãã
- éèã·ã¹ãã ïŒ éè¡ã·ã¹ãã ã蚌åžååŒæããã®ä»ã®éèæ©é¢ã¯ãååŒãä¿è·ãæ©å¯ããŒã¿ãå®ãããã«æå·æè¡ã«å€§ããäŸåããŠããŸããã·ã§ã¢ã®ã¢ã«ãŽãªãºã ãçšããæ»æãæåããã°ãäžçã®éèã·ã¹ãã ã«å£æ» çãªçµæãããããå¯èœæ§ããããŸãã
- æ¿åºããã³è»äºã»ãã¥ãªãã£ïŒ æ¿åºãè»äºçµç¹ã¯ãæ©å¯æ å ±ãä¿è·ããéä¿¡ãã£ãã«ã確ä¿ããããã«æå·æè¡ã䜿çšããŠããŸãããããã®æå·åæ¹åŒãç Žãèœåã¯ãåœå®¶å®å šä¿éãè ããå¯èœæ§ããããŸãã
èéåèšç®æ©æå·ïŒéåã®è åšããã®é²åŸ¡
ã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã«ãã£ãŠããããããè åšã«å¯Ÿå¿ãããããç ç©¶è ãã¡ã¯å€å žã³ã³ãã¥ãŒã¿ãšéåã³ã³ãã¥ãŒã¿ã®äž¡æ¹ããã®æ»æã«èæ§ã®ããæ°ããæå·ã¢ã«ãŽãªãºã ãç©æ¥µçã«éçºããŠããŸãããã®åéã¯ãèéåèšç®æ©æå·ãŸãã¯éåèæ§æå·ãšããŠç¥ãããŠããŸãããããã®ã¢ã«ãŽãªãºã ã¯ãéåã³ã³ãã¥ãŒã¿ã®åããã£ãŠããŠããç Žãããšãèšç®äžå°é£ã«ãªãããã«èšèšãããŠããŸãã
ææãªããã€ãã®èéåèšç®æ©æå·ã®ã¢ãããŒããæ¢æ±ãããŠããŸããããã«ã¯ä»¥äžãå«ãŸããŸãïŒ
- æ ŒåããŒã¹æå·ïŒ ãã®ã¢ãããŒãã¯ãèŠåçãªç¹ã®é 眮ãæã€æ°åŠçæ§é ã§ããæ Œåã«é¢é£ããåé¡ãè§£ãããšã®é£ããã«äŸåããŸãã
- 笊å·ããŒã¹æå·ïŒ ãã®ã¢ãããŒãã¯ãã©ã³ãã ãªç·åœ¢ç¬Šå·ã埩å·ããããšã®é£ãã«åºã¥ããŠããŸãã
- å€å€æ°æå·ïŒ ãã®ã¢ãããŒãã¯ãæéäœäžã®å€å€æ°å€é åŒæ¹çšåŒã®ã·ã¹ãã ã䜿çšããŸãã
- ããã·ã¥ããŒã¹æå·ïŒ ãã®ã¢ãããŒãã¯ãæå·åŠçããã·ã¥é¢æ°ã®ã»ãã¥ãªãã£ã«äŸåããŸãã
- åçš®ååããŒã¹æå·ïŒ ãã®ã¢ãããŒãã¯ãæ¥åæ²ç·éã®åçš®ååãèŠã€ããããšã®é£ãã«åºã¥ããŠããŸãã
ç±³åœåœç«æšæºæè¡ç ç©¶æïŒNISTïŒã¯ãèéåèšç®æ©æå·ã¢ã«ãŽãªãºã ã®æšæºåãäž»å°ããåãçµã¿ãç©æ¥µçã«è¡ã£ãŠããŸãã圌ãã¯ãæšæºåã®ããã®æãææãªåè£ãç¹å®ãéžå®ããããã«ãè€æ°å¹Žã«ãããè©äŸ¡ããã»ã¹ã宿œããŸãããããã€ãã®ã¢ã«ãŽãªãºã ãæšæºåã®ããã«éžå®ãããä»åŸæ°å¹Žã§æçµæ±ºå®ãããèŠèŸŒã¿ã§ãã
éåã³ã³ãã¥ãŒãã£ã³ã°ã®çŸç¶
ã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã¯å°èŠæš¡ãªéåã³ã³ãã¥ãŒã¿ã§å®èšŒãããŠããŸããã倧ããªæ°ãå æ°åè§£ã§ããéåã³ã³ãã¥ãŒã¿ãæ§ç¯ããããšã¯äŸç¶ãšããŠéå€§ãªæè¡ç課é¡ã§ãããã®å°é£ãã«ã¯ããã€ãã®èŠå ãå¯äžããŠããŸãïŒ
- éåãããã®å®å®æ§ïŒ éåãããã¯ç°å¢ãã€ãºã«éåžžã«ææã§ãããèšç®ãšã©ãŒãåŒãèµ·ããå¯èœæ§ããããŸããéåãããã®å®å®æ§ãšã³ããŒã¬ã³ã¹ãç¶æããããšã¯å€§ããªé害ã§ãã
- éåãããæ°ïŒ å€§ããªæ°ãå æ°åè§£ããã«ã¯ãããªãã®æ°ã®éåããããå¿ èŠã§ããæ°åãŸãã¯æ°çŸäžã®å®å®ããéåããããæã€éåã³ã³ãã¥ãŒã¿ãæ§ç¯ããããšã¯ã倧ããªæè¡ç課é¡ã§ãã
- 誀ãèšæ£ïŒ éåã³ã³ãã¥ãŒã¿ã¯ãšã©ãŒãèµ·ããããããè€éãªèšç®ã確å®ã«è¡ãããã«ã¯èª€ãèšæ£ãäžå¯æ¬ ã§ããå¹ççãªéå誀ãèšæ£ç¬Šå·ã®éçºã¯ã掻çºãªç ç©¶åéã§ãã
- ã¹ã±ãŒã©ããªãã£ïŒ çŸå®äžçã®åé¡ã«å¯Ÿå¿ããããã«éåã³ã³ãã¥ãŒã¿ãã¹ã±ãŒã«ã¢ããããã«ã¯ãæ°å€ãã®æè¡çããŒãã«ãå æããå¿ èŠããããŸãã
ãããã®èª²é¡ã«ãããããããéåã³ã³ãã¥ãŒãã£ã³ã°ã®åéã§ã¯å€§ããªé²æ©ãèŠãããŸããGoogleãIBMãMicrosoftãªã©ã®äŒæ¥ããã®ä»å€ãã®äŒæ¥ããéåããŒããŠã§ã¢ããã³ãœãããŠã§ã¢ã®éçºã«å€é¡ã®æè³ãè¡ã£ãŠããŸããRSAãç Žãããšãã§ãããã©ãŒã«ããã¬ã©ã³ããªæ±çšéåã³ã³ãã¥ãŒã¿ã¯ãŸã æ°å¹Žå ã§ãããéåã³ã³ãã¥ãŒãã£ã³ã°ãæå·æè¡ã«äžããæœåšçãªåœ±é¿ã¯åŠå®ã§ããŸããã
äžççãªåœ±é¿ãšå°æ¥ã®æ¹åæ§
éåã³ã³ãã¥ãŒã¿ã®éçºãšæœåšçãªå±éã¯ãäžçã®æ å¢ã«æ·±å»ãªåœ±é¿ãåãŒããŸãïŒ
- å°æ¿åŠçãªåœ±é¿ïŒ éåã³ã³ãã¥ãŒãã£ã³ã°æè¡ã«ã¢ã¯ã»ã¹ã§ããåœã¯ãè«å ±æŽ»åããµã€ããŒã»ãã¥ãªãã£ããã®ä»ã®æŠç¥çåéã§å€§ããªåªäœæ§ãåŸãå¯èœæ§ããããŸãã
- çµæžçãªåœ±é¿ïŒ éåã³ã³ãã¥ãŒã¿ãšèéåèšç®æ©æå·ã®éçºã¯ããœãããŠã§ã¢éçºãããŒããŠã§ã¢è£œé ããµã€ããŒã»ãã¥ãªãã£ãµãŒãã¹ãªã©ã®åéã§æ°ããªçµæžçæ©äŒãåµåºããŸãã
- ç ç©¶éçºïŒ éåã³ã³ãã¥ãŒãã£ã³ã°ãšèéåèšç®æ©æå·ã«ãããç¶ç¶çãªç ç©¶éçºã¯ãé²åããè åšã®ç¶æ³ã«å ãããããã«äžå¯æ¬ ã§ãã
- ã°ããŒãã«ãªååïŒ éåã³ã³ãã¥ãŒãã£ã³ã°ã«é¢é£ãããªã¹ã¯ã軜æžããããã®å¹æçãªæŠç¥ãéçºãã宿œããããã«ã¯ãåœéååãäžå¯æ¬ ã§ããããã«ã¯ãç¥èã®å ±æãå ±éã®æšæºã®éçºãç ç©¶åªåã®èª¿æŽãå«ãŸããŸãã
- æè²ãšèšç·ŽïŒ 次äžä»£ã®éåç§åŠè ããšã³ãžãã¢ãæè²ã»èšç·Žããããšã¯ãéåæè¡ã責任ãæã£ãŠéçºã»å±éããããã«å¿ èŠãªå°éç¥èã確ä¿ããããã«äžå¯æ¬ ã§ãã
çµè«
ã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã¯ãæå·æè¡ãšéåã³ã³ãã¥ãŒãã£ã³ã°ã®æŽå²ã«ãããæ¥µããŠéèŠãªç¬éã衚ããŠããŸããã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã®å®çšçãªåœ±é¿ã¯ãŸã æããã«ãªãã€ã€ãããŸããããã®çè«çãªåœ±é¿ã¯åŠå®ã§ããŸãããéåã³ã³ãã¥ãŒãã£ã³ã°æè¡ã鲿©ãç¶ããäžã§ãèéåèšç®æ©æå·ã«æè³ããéåæ»æã«é¢é£ãããªã¹ã¯ã軜æžããããã®æŠç¥ãéçºããããšã極ããŠéèŠã§ããåœé瀟äŒã¯ãéåã®è åšã«çŽé¢ããŠãå®å šã§å埩åã®ããããžã¿ã«ãªæªæ¥ã確ä¿ããããã«ååããªããã°ãªããŸããã
ãã®ã·ã§ã¢ã®ã¢ã«ãŽãªãºã ã®å æ¬çãªè§£èª¬ã¯ããã®ä»çµã¿ã圱é¿ããããŠå°æ¥çãªæå³åãã«ã€ããŠã®åºç€çãªçè§£ãæäŸããããšãç®çãšããŠããŸãããããã®æŠå¿µãçè§£ããããšã§ãå人ãçµç¹ããããŠæ¿åºã¯ãéåé©åœã«ãã£ãŠãããããã課é¡ãšæ©äŒã«ããè¯ãåããããšãã§ããŸãã