Intruders - Intruders LeiChen ,Sweden Henric Johnson 1...

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Henric Johnson 1 Intruders Slides adapted from work by Henric Johnson Blekinge Institute of Technology, Sweden Lei Chen
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2 Outline Intrude rs Intrus io n Te c hniq ue s Pas s wo rd Pro te c tio n Pas s wo rd S e le c tio n S trate g ie s Intrus io n De te c tio n
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3 Intruders Thre e  c las s e s  o f intrude rs  (hac ke rs  o r  c rac ke rs ): Mas q ue rade r Mis fe as o r C lande s tine  us e r
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4 Intrusion Techniques S ys te m  m aintain a file  that as s o c iate s  a  pas s wo rd with e ac h autho rize d us e r. Pas s wo rd file  c an be  pro te c te d with: O ne -way e nc ryptio n Ac c e s s  C o ntro l 
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5 Intrusion Techniques Te c hniq ue s  fo r g ue s s ing  pas s wo rds : Try de fault pas s wo rds . Try all s ho rt wo rds , 1 to  3 c harac te rs  lo ng . Try all the  wo rds  in an e le c tro nic   dic tio nary(60,000). C o lle c t info rm atio n abo ut the  us e r’s  ho bbie s ,  fam ily nam e s , birthday, e tc .
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