An anonymous reader shares a report: For over a decade Pwn2Own — happening this week — has brought together security talent from across the globe in a friendly hacking competition that is a cornerstone of research and advancement on par with Black Hat and Def Con. China’s hackers routinely win, sweeping the board — notably, the Tencent and Keen teams. Pwn2Own is good-natured, and all in the name of researchers finding big bugs, nabbing great bounties and drawing attention to security holes and zero-days that need to be fixed. But this year, according to Pwn2Own manager Brian Gorenc, China is no longer allowing its researchers to compete. Prior to the start of Pwn2Own this week, Gorenc told press “There have been regulatory changes in some countries that no longer allow participation in global exploit contests, such as Pwn2Own and Capture the Flag competitions.”

One thing’s for certain: yearly champions Tencent’s Keen Labs and Qihoo 360’s 360Vulcan team are nowhere to be found and Trend Micro, the conference organizer, has confirmed to Engadget that there are no Chinese competitors in this year’s competition. […] It’s a worrying development in the direction of isolationism and away from the benefits of competition in the spirit of improving security for all. It comes at a time when relations between the US and China strain under the weight of Huawei security concerns, which are not at all new, but are certainly coming to a head as American companies sever business ties with the firm.