Nowadays, information systems are mostly threatened by information stealing and destroying attacks launched by such malware as virus, worm, Troy horse and spy-ware.
显式授权机制具备很好的安全性质，能有效地防御信息窃取和破坏攻击。
Troy was glad to take the horse as the spoils go to town.
特洛伊人高兴地把木马当作战利品抬进城去。
At last, the famous Greek hero Odysseus came up with the "Trojan horse" trick, made a huge wooden horse, and put it out of Troy.
最后，希腊著名的英雄奥德修斯想出了一个木马计，用木头做了一匹巨马，放在特洛伊城外。
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