MD5
绠楁硶鏀硅繘鍙婂叾搴旂敤鐮旂┒
鎽?/p>
瑕?/p>
锛?/p>
鍝堝笇绠楁硶鏄幇浠ｅ瘑鐮佸鐨勬牳蹇冿紝鏈枃鍦ㄧ粰鍑?/p>
MD5
甯歌浼樺寲绠楁硶鐨勫熀纭�涓婏紝閲囧彇涓ょ鎬濊矾瀵?/p>
MD5
杩涜鏀硅繘锛屽苟瀵规敼杩涚粨鏋滆繘琛屽姣斻�傚悓鏃跺绠楁硶鐨勫簲鐢ㄥ満鍚堝強鍏跺簲鐢ㄦ晥鏋滆繘琛屼簡鐮旂┒銆?/p>
鍏抽敭璇嶏細
MD5
锛?/p>
802.1X
锛?/p>
EAP-MD5
MD5 Research
CUI Y
onghui
1
JIA Lianxing
2
LI Zhiwei
3
Abstract:
The HASH algorithm is the core of modern cryptography. The paper presents the common optimization algorithm
based on MD5, and takes two means of improvement with programming on MD5 algorithm. We can make an intuitive understanding
of the algorithm with the comparisons.At last, the application situation and the application effect of the algorithm are studied in this
paper.
Keywords:
MD5; 802.1X; EAP-MD5
0.MD5
绠楁硶
MD5
绠楁硶
[1]
瀵逛换鎰忛暱搴︾殑鏂囦欢杩涜涓嶅彲閫嗗彉鎹紝鏄寜鐓у浐瀹氱殑寰幆鍜岃绠楀婧愭暟鎹俊鎭?/p>
杩涜鍔犲瘑锛屾渶缁堢敓鎴?/p>
128
浣嶇殑鍔犲瘑鏁版嵁銆傜敱浜庢暣涓繃绋嬭绠楅噺姣旇緝澶э紝鑰屼笖杩囩▼闈炲父绻佺悙锛?/p>
鎵�浠ュ湪绠楁硶瀹炵幇鏃讹紝浼氳�楄垂澶ч噺鐨勬椂闂淬�?/p>
鐩墠瀵?/p>
MD5
绠楁硶鐨勭爺绌跺強鎬ц兘浼樺寲鏂规硶杈冨
[2][3][4]
锛屼富瑕佷綋鐜板湪澧炲己鍏跺姞瀵嗗己搴﹀拰鎻愰珮
瀹冪殑鎵ц鏁堢巼涓や釜鏂归潰銆傞�氬父鑰冭檻閫氳繃浠ヤ笅鎵嬫鍔犱互鏀硅繘锛氫竴鏄敼鍙?/p>
MD5
鍒濆鏁板�笺�傛妸
4
涓?/p>
MD
缂撳啿瀵勫瓨鍣ㄥ垵濮嬫暟鍊肩◢寰洿鏀癸紝褰㈡垚鏂版秷鎭憳瑕佺畻娉曘�備簩鏄敼鍙?/p>
sin
鍑芥暟鍊笺�傜畻娉曚腑锛?/p>
sin
鍑芥暟浠?/p>
0
寮�濮嬫瘡娆＄疮鍔?/p>
1
锛?/p>
鍙互鏇存敼涓轰粠
64
寮�濮嬫瘡娆＄疮鍑?/p>
1
锛?/p>
鎴栬�呭彉
sin
鍑芥暟涓?/p>
cos
鍑芥暟锛?/p>
鍙樺姩鐨勭▼搴忚緝鏄撲慨鏀癸紝涔熷叿鏈夎緝濂界殑绉绘鎬с�備笁鏄娆″姞瀵嗐�傚疄琛屽崟娆℃秷鎭憳瑕佺畻娉曞姞瀵嗕箣
鍚庯紝
閽堝浜х敓鐨勫瘑鐮佹墍鏈夋垨鑰呬竴浜涘啀娆″疄琛屽崟娆℃垨鑰呭娆′慨鏀癸紝
浣垮叾鏇撮毦鍦ㄥ瓧鍏镐腑蹇�熸煡鎵俱�?/p>
鍥涙槸鏌ヨ搴撴坊鍔犵洂
(salt)
銆傚鎴疯缃瘑鐮佽繃绋嬩腑锛屼骇鐢熼殢鏈虹洂锛?/p>
Salt
锛?/p>
锛屽偍瀛樹簬鍙﹀鐨勪俊鎭〃鎴?/p>
鑰呮煡璇㈠簱鍐咃紝鍜屽鎴峰彛浠ゅ郊姝よ仈绯伙紝涔嬪悗浣跨敤
hash
鍑芥暟閽堝鐩愶紙
Salt
锛夊疄琛屾秷鎭憳瑕佺畻娉曞姞
瀵嗭紝杩涜�屼娇閫嗗悜鏌ヨ鏇撮毦銆?/p>
1
绠楁硶鏀硅繘
涓�鏄簿绠�杩唬娆℃暟锛屼负浜嗘彁楂樺叾鎵ц鏁堢巼锛岄檷浣?/p>
MD5
绠楁硶澶嶆潅搴︼紝鍙互閫傚綋绮剧畝