One of the crucial steps in the TLS handshake is for the server to prove its identity to the client. While there is plenty of content explaining the principles of the handshake, there's less information about certificates, which are a critical component of TLS/SSL. This series of articles aim to explain what certificates are used for, how Google prevents others from impersonating Google, and why certificate issues frequently arise, among other topics.(Postscript: It took me a full 10 hours to write these articles. It's quite straightforward, with no mathematical content, just a few OpenSSL com...

As a tech site which aims to share knowledge and experience, content is its core value. To attract readers, it needs to produce valuable content and keep the originality of the content. When an article is published on a site, it should be a copyrighted property of that site or the original author while others should be very careful when considering to copy that article to their own site. They should generally avoid to copying the whole content of the article.However, in reality, this is not the case. There are many cases where people would just copy the whole content and append a statemen...

Are you curious about what are their early homepages like for some famous IT companies? Let's take a look at them now.1. GoogleThis page was relative concise at that time. The current Google homepage is more concise.2. FacebookIt went online on 4th Feb, 2004. This was its homepage in 20043. YouTubeIt went online on 15th Feb, 2005. Until 22nd April, the first video clip was uploaded.4. WikipediaIt emphasizes on free content and collaborative editing. It also supports many languages.5. YahooIt was created in January 1994.6. TwitterIt was called twttr at first. 7. BloggerIt's acquired by Goo...

Each website has a color scheme which identifies itself. By looking at one color, we can know which website it is for. These color schemes can be identified from their logos, nav-bars, background etc. We collect some color schemes for some famous Chinese websites.Alibaba (#f90) Baidu (#0000cc) Huawei (#e30a12) HTC (#69b40f) JD (#c91623) Renren (#105ba3) Sina (#e4351e) Sohu (#fdd000) Taobao (#ff4400) Tencent (#0397de) Tmall (#b10000) WeChat (#5ba607) Xiami (#f39200) Zhihu (#0078d8) 163 (#333) 36Kr (#146fb9) 360 (#48...

No matter how big the iOS 7 design change is or no matter how unhappy you you fee about iOS 7, you cannot deny that iPhone is still the best phone on earth and App Store is the best software eco-system.There are lots of excellent apps on iOS, the overall quality of apps on iOS are better than other platforms. Some apps are also only available on iOS. These apps may also have excellent websites to promote. Now let take a look at some cool app websites.Currency Converter AppTriplAgent Pica Pica Hy app Sipp 2 Foursquare StatNut App Over iTrackMyTime APP Gre...

With more pervasive of web applications, web security threats are becoming increasingly prominent. Hackers gain web server control by exploiting web server vulnerabilities and SQL injection vulnerabilities, then they may tamper with web content, or steal important internal data, the more serious is to inject malicious code into web pages to affect visitors of websites. Attention is gradually warming up to Web Application Security. Here we recommend eight very useful and free web security testing tools.N-Stalker Free VersionN-Stalker Web Application Security Scanner 2012 Free Edition provides a...

Since Instagram was acquired by Facebook, its popularity continually heats up. Some  data shows that independent views of  Instagram surges 78%.In April, Instagram’s website saw a 78 percent uptick in unique visitors in the U.S., making the web property of the photo-sharing phenom the highest gaining site on the Internet for the month, according to analytics firm comScore.. For an application whose all functions are present in the mobile terminal, the site of Instagram is only used as a simple introduction, such a result is especially dazzling.In April, Instagram has a few big...

There is one statement which says Giving out your email address is like starting a relationship. What happens when you want to break up?Once you gave out your email address, you may take the risk of receiving big amount of junk emails. However, when we register on some websites, we must provide our Email address to receive authentication emails. If we cannot receive the authentication email, we cannot finish the registration process. Is there any alternative way?We can use disposable email, i.e, some email address are like disposable chopsticks, we can throw them once we finish using them.Curr...