GreatFire June: Bloomberg Blocked As Well As Hundreds Of Additional Keywords On Weibo

The big question for people following online censorship in China is a simple: is censorship increasing or decreasing in China? Many cite the growth of microblogs such as Sina Weibo, as well as the total number of Internet users in China, and argue that while censorship is pervasive, overall, things are opening up. However, two developments during the month of June suggest otherwise. The first was that Bloomberg was blocked, the first time in years that a major, English-language news website was blocked. The second was that out of the 15,000+ keywords on Sina Weibo, Google and Wikipedia that we are monitoring, an additional 231 were blocked while only 24 were unblocked. It would seem that the grip on censorship is tightening.

In a curious incident, Henan News published a story mentioning the Great Firewall by name both in Chinese and English. The story was quickly deleted, but thanks to Google Cache you can still view it here.

Bloomberg Blocked - More To Come? was blocked on June 29. As a major, English-language news website, this means that Bloomberg has been singled out by the Chinese authorities. This followed a lengthy report by Bloomberg on the family wealth of Xi Jinping, the man presumed to replace Hu Jintao as Chairman of the Communist Party later this year. The obvious reason for blocking Bloomberg would be to prevent Chinese netizens from reading the story in the first place. This is not all that effective however, since blocking it only brought more attention to the story, and much of the content of the story could soon be found on other foreign media websites which themselves were not blocked. The authorities could have blocked access to the story without blocking Bloomberg altogether, as they did with a story in The Economist about the Bloomberg story on Xi Jinping. Another interpretation is that the authorities wanted to send a warning to foreign journalists in China: don't go too far, or we'll block you altogether, because bloomberg China which is a technical site and contains no reports of Xi Jingping is blocked even though it acquired an ICP license from Chinese authority ,  That would also be supported by the expulsion of a foreign journalist in May, the first such action since 1998. We could likely write a separate post on how foreign news organizations agree to self-censor their content in exchange for market access in China but for the purposes of this story we will assume that the authorities block the content that they want to block.

At almost the same time, the New York Times launched a Chinese edition of it's website, which has so far not been blocked. The fact that most other Chinese versions of foreign media websites are blocked suggest that this is just a question of time. Also, as we reported on July 3, the Weibo accounts of the New York Times were quickly closed on both Sina and Tencent.

Here's an overview of major news websites and which ones are currently blocked. We'll follow their progress with great interest.

English WebsiteChinese WebsiteComments 
http://www.ft.comhttp://www.ftchinese.comIndividual articles on the Chinese edition such as this one are blocked. 
http://www.nytimes.comhttp://cn.nytimes.comLaunched in June, 2012. Will it be blocked? 

Google (Quietly) Continues To Bring Transparency To Censorship

As we reported last month, Google launched a new feature which notifies users trying to search for certain keywords that would otherwise be blocked by the Great Firewall. The new function was quickly disabled by the Chinese authorities by blocking access to the javascript file in which it was defined. Since then, Google has cleverly responded by embedding all the required code and data of what's blocked in the html file. This makes it difficult for the Great Firewall to disable this transparency function without blocking Google altogether. So far, they've done nothing and as this is written the feature is working in China.

If Google wants to, they could take this much further. If a user clicks on a URL known to be blocked, for example, they could inform the user and even offer suggestions of ways around the censorship. We'll keep following the Google vs Great Firewall battle closely.

Unblocked Foreign Websites Keep Getting Faster

As can be seen in the chart below, foreign websites that are not blocked continue the trend of getting faster in China. The data is based on average download speed of Alexa Top 500 websites not hosted in China, per month.

Loading chart..

Keywords Blocked And Unblocked

Below is a list of 231 unique keywords that were blocked in June. Only keywords that we know were not blocked before June are included. Also, there's a list of 24 keywords that were previously blocked, and were unblocked during June. As always, if you think anything is missing, please add it to our database for testing using the search bar on the top of this page. All URLs and keywords in our database are continously tested so that we can detect changes.

Other Notable Changes

Do you remember At least the people in charge of the Great Firewall seem to - they blocked it last month. On the other hand, was unblocked at least as of June 1. was blocked at least as of June 24 but the shorter domain which is used for short links is still not blocked.


More Blog Posts

Subscribe to our mailing list
Show content from Blog | Google+ | Twitter | All. Subscribe to our blog using RSS.

Thu, Sep 24, 2015

Apple blocked CNNIC CA months after MITM attacks

In March of this year, Google found unauthorized digital certificates for several Google domains. The root certificate authority for these domains was the China Internet Network Information Center (CNNIC). CNNIC was controlled by the Chinese government through the Ministry of Industry and Information Technology and is now under the management of the Cyberspace Administration of China (CAC). CNNIC was recognized by all major browsers as a trusted Certificate Authority. If CNNIC signs a fake certificate used in a man-in-the-middle attack, no browser will warn of any unusual activity unless the certificate is pinned.

Wed, Sep 23, 2015

Malicious Xcode could spread via download manager Xunlei

What’s at stake?

We reported last week that popular Chinese iOS apps were compromised in an unprecedented malware attack. We discovered that the source of the infection was compromised copies of Xcode hosted on Baidu Pan. Apple has published an article urging developers to download Xcode directly from the Mac App Store, or from the Apple Developer website and validate signatures. We’ve now discovered that even if a developer uses a download link seemingly from Apple, he might still be possible to obtain a compromised copy of Xcode.

Please note that we do not have evidence that such attacks has happened. But it is an easy attack that anyone can implement.

How does it work?

This compromise happened because of Xunlei. Xunlei is the most popular download manager in China. Much of its popularity is due to the fact they can accelerate download speeds by pulling resources from other Xunlei users as well as cached copies on the Xunlei server. All of this, however, is invisible to users. Users can simply enter a regular http download address into Xunlei  download manager and the download will start. Chinese developers were using direct download addresses such as to download Xcode.

Mon, Sep 21, 2015



Sat, Sep 19, 2015

Popular Chinese iOS apps compromised in unprecedented malware attack

What happened?

According to recent reports, some versions of Xcode used by developers in China have been compromised and are being used to inject tracking codes in iOS apps without developer knowledge. (1,2). Unaware of the injection, those developers then released their compromised iOS apps to the App Store which were then later approved by Apple. At the time of writing this post, the compromised apps are still available in the App store. Any user who has installed and launched these compromised apps will be a victim of these tracking codes.

This is a significant compromise of Apple’s app store. Apple notoriously manually reviews all app submissions and, in comparison to Android stores, has been relatively malware-free. This is the most widespread and significant spread of malware in the history of the Apple app store, anywhere in the world.

The compromised version of Xcode was hosted on Baidu Pan. It is unlikely that Baidu was aware of the compromised version of Xcode. The company removed the files yesterday when news of the compromise surfaced. Because of slow download speeds from foreign websites in China, many Chinese developers prefer to download apps from domestic websites. Many Chinese also use download software like Xunlei, rather than downloading directly from the official Mac App Store.

According to users reports, many prominent Chinese apps are affected. We have included links to the compromised apps in the list below but DO NOT DOWNLOAD these apps. We are simply linking to them so that users can recognize the apps. Affected apps include:  

Wechat The most popolar messaging app in China 

Wed, Sep 16, 2015



Roya, David, Nick, nweaver, Vern, 和我刚刚完成了关于GFW主动探测系统的研究。这个系统在几年前就被用来探测翻墙工具,比如Tor。我们在之前的博文中介绍过GFW主动探测系统是如何工作的。但有几个问题我们没有回答。比如这个系统的物理结构是怎样的。那些用来主动探测的IP是归GFW所有的么? 有猜测GFW短时间内劫持了部分IP来用来主动探测,但没有证据。这次研究回答了这些问题。


  • 通常来说,如果Tor的某个网桥代理被GFW检测并封锁,它会一直被封锁。但是这意味着网桥代理完全无法访问吗? 我们让中国的VPS一直连接我们控制的网桥代理。我们发现,每25小时,中国的VPS可以短暂的连接到我们的代理网桥。下图显示了这个现象。每个数据点表示中国的VPS试图与网桥代理建立连接。中国联通和中国教育网都有这个周期性现象。有时候,网络安全设备在更新规则时会默认允许所有流量,但我们不知道GFW周期性现象是不是因为这个原因导致的。

  • 我们找到了规律,GFW主动探测的TCP头暗示那几千个IP都来自与同一个地方。下图显示了数据包的初始序号和时间。每个数据点都是一个主动探测连接。如果每个主动探测都是从不同地方发出的,我们应该看到随机的数据点,因为数据包的初始序号是随机选择的。但是下图显示主动探测连接虽然来自不同IP,但是非常有规律。我们认为主动探测的初始序号是按照时间产生的。


Subscribe to our blog using RSS.


this post is awesome, great msg for us, plz update ur blog for daily basis, i am regular visitor of this site, so keep posting for us,

click the below links to create backlink
best free backlink website
click here for msg movie

Add new comment

Filtered HTML

  • Web page addresses and e-mail addresses turn into links automatically.
  • Allowed HTML tags: <a> <em> <strong> <cite> <blockquote> <code> <ul> <ol> <li> <dl> <dt> <dd>
  • Lines and paragraphs break automatically.

Plain text

  • No HTML tags allowed.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Lines and paragraphs break automatically.
By submitting this form, you accept the Mollom privacy policy.