ࡱ> EBCD ( ( x dwww.google.com,http://www.google.com// 0DArialngs0,v0,0$DTimes New Roman,v0,0$ DWingdingsRoman,v0,0$@ .  @n?" dd@  @@`` ldl****21// ..5  !"#$%&'( 0AAp3f3MMMwww3ff@8ʚ;ʚ;g4ddD0 ppp@  <4ddddp̨00___PPT10 ppl___PPT9N^VnL+%㨹O3!`PNG  IHDR asRGBcPLTE!!!BBBkccsssRJJ911111)))便{{{RRRkkkZZZ֭skkB99cZZ999)!!|7 cmPPJCmp0712,JQtRNS0J`IDATnAaUh: te)Kܿ gAcN2JmݛeGMU9^yW?{gMܤ`j{5nLIENDB`  @?-04 October 2006 L 2006 Rhye Internet Solutions LimitedO  =_Open Source Security Is Open Source software more or less secure than proprietary equivalents?*`0J KPeter SJF Bance CEng MBCS CITP Technical Director, Rhye Internet Solutions Limited CESG and BCS Listed Security Adviser peter.bance@rhyeinternet.com(Zw6T %   The Arguments  Secure coding practices Code audit / review Developer motivation / integrity Vendor liability / commitment Distribution mechanisms Vulnerability alerting / patching Ownership, updates and maintenance Security through secrecy (obfuscation) 00ZZ  So who is right?  :Clearly, this is a grey area&   The Open/Closed source decision will need to be made based on your situation, taking into account such factors as: Corporate policy Reliability requirements Maintainability Security requirements In-house knowledge and skills Rtnsn  5  The question: Is Open Source software more or less secure than proprietary equivalents? The answer? This will depend on your specific situation.T lJ -  K: 7 :We need a different approach&    Risk Assessment Information Assets (value/impact)  Confidentiality, Integrity & Availability Business Domains (interconnectivity) Attack groups Capability / Motivation a" Threat Compromise Paths Opportunity / Deterrence a" Likelihood Is the resultant risk acceptable?j0lZ#&0lZP@"!   8 : Only by assessing the risks associated with each individual requirement can we decide whether the  right solution involves Open or Closed Source products.Z  ' Summary 3 There is no simple answer to the question of whether Open or Closed Source is more secure, and it may be dangerous to generalise. 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