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  Different types of keystore in Java -- PKCS11


PKCS11 keystore is designed for hardware storage modules(HSM). It's an interface to talk to the HSMs. It doesn't actually store any keys but provide a set of classes to communicate with the underlying HSM. The actual keys and certificates are stored on the HSMs. The reason for storing the keys and materials is to ensure security and efficiency. Since the keys are on the HSMs, they are safe to be stolen. All encryption/decryption operations are performed on the HSMs as well, this increase the...

   PKCS11,keystore,HSM,Java     2015-01-08 00:39:12


  9 fields platform companies need to fight for


If you are person reading technology news much, you will find a large part of the tech news are about a few companies : Apple, Google, Facebook, Amazon and Microsoft, in which the first four are today's "Big Four (platform)" as said by Google Chairman Eric Schmidt. These giants have both competition and cooperation in many areas, and each has its own place in the world, with Schmidt's words, Google dominates search, Apple designs device, Amazon occupies e-commerce and Facebook leads social. Alth...

   Big four, Future,Software and hardware     2012-10-20 09:50:43


  Code Optimization Techniques for Graphics Processing Units


Books on parallel programming theory often talk about such weird beasts like the PRAM model, a hypothetical hardware that would provide the programmer with a number of processors that is proportional to the input size of the problem at hand. Modern general purpose computers afford only a few processing units; four is currently a reasonable number. This limitation makes the development of highly parallel applications quite difficult to the average computer user. However, the low cost and th...

   Optimazation,GUI,Graphic processing     2011-12-18 01:11:53


  Amazon is a good company but doesn't have the best business model


Public opinion about a company is usually based on its performance. If it performs well, people will praise it, otherwise people will blame it. In 1999, Apple was still a broken apple(Steve Jobs's talent and effort was paid off yet). Public opinion about Apple was the closed model caused Apple's failure. They built hardware themselves, developed software themselves and delivered service themselves, this is certainly not sustainable. But Steve Jobs let everyone see this new model. In order to con...

   Business model,Amazon,Apple, Microsoft     2013-07-02 11:34:45


  Want to install 64 bit OS on VirtualBox?


By default, VirtualBox only allows to install 32 bit OS on it. But sometimes, 64 bit OS is wanted for specific uses such as running platform specific tests. To allow installing 64 bit OS on VirtualBox. Below information is needed. Here is the official documentation about 64 bit OS: VirtualBox supports 64-bit guest operating systems, even on 32-bit host operating systems, provided that the following conditions are met: You need a 64-bit processor with hardware virtualization support (see the ...

   VirtualBox,64 bit,hardware virtualization,Ubuntu     2014-11-08 03:52:07


  Flash, HTML5 comparison finds neither has performance advantage


A comparison of streaming video via the Adobe Flash and HTML5 formats with numerous different browsers on both Mac and Windows produced wildly different results based on the operating system and browser, making neither a clear winner. The test, from Streaming Learning Center, was conducted in response to recent comments alleged to have been said by Apple co-founder Steve Jobs, in which he reportedly called Flash a "CPU hog." While the test found that HTML5 is significantly more efficient th...

   html5,flash,performance,comparison     2011-07-01 10:08:00


  Extending Native Features To HTML5 Web Apps


A small company called AppMobi is enabling developers to create HTML5 apps that tap into native hardware and OS capabilities of mobile devices, such as gravity sensing, accelerometer, GPS, camera, sound and vibration, and the file system, InfoWorld reports. 'Its MobiUs browser for iOS implements HTML5's DirectCanvas API for gaming, as well as the HTML5 local storage API for saving executables and data in the browser cache so that apps can run offline. But what makes MobiUs more than just ye...

   HTML,WebApp,Hardware,Local storage,Gravity accelaration,AppMobi     2011-11-07 02:57:08


  Linux Clock : CST,UTC and NTP setup


1. There is an option when you set up clock on installing Linux: system clock users UTC, so what does UTC mean? It's Universal Time Coordinated(UTC), there are two different times in GPS system: one is UTC , the other one is LT(Local Time). The difference between these two is just the timezone difference, UTC is the time in timezone 0. If the local time in Beijing is 8 o'clock in the morning, then UTC time is 0 o'clock, which is a 8 hour difference. 2. In Linux, when we use date to check the tim...

   Linux,Clock,UTC     2013-03-21 12:19:30


  What surprise Google brings us in Nexus 5?


Because Nexus 4 performed well after release, many people are confident of the performance of the upcoming Nexus 5. It is manufactured by LG and equipped with attractive configurations. LG Nexus 5 will have Android 5 installed, as for hardware, it will have a 5.2 inch screen with a resolution of 1920x1080  Also the processor will be a 2.3GHz Quad-Core processor. The exciting part is it has a 4GB(Some says it's 3GB) memory which is larger than almost all current Android devices which have 2G...

   Nexus 5,Google,LG     2013-04-08 07:37:41


  Android Hardware Buttons are not broken, let me tell you why


This post is written as a reaction on Christoffer Du Rietz’s article The Android Hardware-Buttons Are Broken. In his article Christoffer explains how the Android back button shows inconsistent behavior like doing different actions when it is used on the same screen.In the following article I will try to explain that this behavior is not broken. Instead it is exactly what the Android developers had in mind while designing the back button behavior.The way the back button is broken according to C...

   Android,Hardware,Button,Protect     2011-11-03 13:38:21