Just like this article, several other entities may be skeptical on assertions that North Korea is involved given the past involving Iraq's imaginary WMD...etc.

Just like this article, several other entities may be skeptical on assertions that North Korea is involved given the past involving Iraq's imaginary WMD...etc. Also, cyber attacks may be common in future, for whatever may be the reasons involved. In future, if some Hollywood studio makes a movie on Russia's Putin or on China and if hackers claiming from the injured country do similar cyber-attack on that studio and If USA retaliates and if Russia/china counter-retaliates and if this spills into physical world, then we can have nightmarish situations/tensions and may be full blown war. Worse, another country may do that sort of attack from some other country to hide its trail. Hope proper sense and calm minds prevail to prevent such nightmare. But such possibility exists in theory. As solution, world needs an international, independent, competent panel/forum/group to investigate openly/transparently all cyber-attacks and find out culprits rather than doing mere guess work. Also, evidence of the crime need to be put in public domain to avoid conspiracy theories. This can be on the lines of international court of justice/United nations ...etc. Since parties involved are entities like Sony which are not connected to national defence directly, we need not fear national secrets leaking out ...etc i.e. it can be done without impacting the sovereignty of the nations involved. Without such arrangement, stability and peace of the world will always be in question for any cyber attack on any major country such as USA/Europe/China/Russia ...etc. TL,DR: Cyber-attacks on economic entities such as Sony or Google in the past involving several countries need to be investigated by international body rather than a single country and evidence of the crime need to be in public domain to avoid conspiracy theories.