SEARCH KEYWORD -- Security camera


  Generate certificate in Java -- Certificate chain

In previous post, we have introduced the use of Certificate and how to generate self signed certificate using Java. In this post, we will show you how to generate a certificate chain. Sometimes we may only have a certificate request or we don't have a trusted certificate which can be used for business. Now we need to have a trusted CA to sign our certificate so that it can be used on SSL communications. To generate a certificate chain, we may first have our own certificate(A), then we may use ot...

   Java,Certificate chain,Creation, Pure Java     2014-07-30 08:24:52

  Nokia unveils Lumia 820

Just finishing introducing the latest flagship model Lumia 920 Nokia introduced mid-range Lumia 820 which is equipped with Windows Phone 8The Lumia 820 is equipped with a Qualcomm Snapdragon S4 1.5GHz dual-core CPU, but the screen is 4.3 inch WVGA screen with 800 x 480 pixels, at the same time it is equipped with 8GB memory space and a 8-megapixel rear camera. In addition, users can extend 8 GB more memory space through Windows Phone 8's extension function.Lumia 820's screen adopts Super S...

   Nokia,Lumia 820,Window Phone 8     2012-09-05 19:10:14

  Arrays.equals() vs MessageDigest.isEqual()

Both Arrays.equals() and MessageDigest.isEqual() are used to compare the equality of two arrays. They can be interchangeably in many cases. However, they do have some differences which lead to different use cases in real applications. One difference is that the arrays passed to MessageDigest.isEqual() cannot be null while it's ok for Arrays.equals(). The one major difference between these two methods is that Arrays.equals() is not time-constant while MessageDigest.isEqual() is time-constant. Thi...

   Arrays.equal(),MessageDigest.isEqual(),Java,Security     2015-05-14 22:03:29

  Create wireless hotspot on your smartphone

It's now very common that you may not get Internet connection in first few days when you move to a new place. And you may have some important things to handle or you may just want to connect to Internet and share with others your new place. If you have a smartphone which has enough mobile data package, then you are on the way to enjoy Internet. Today we will introduce how to create a wireless hotspot on your smartphone with Samsung Galaxy S3 i9300. Step 1 Go to Settings -> More Settings ->...

   Wireless hotspot, Smartphone, Samsung     2013-01-12 23:08:39

  Galaxy S III will be released on May 3

Samsung Galaxy S II's popularity makes people look forward to the next generation of Galaxy mobile phones. As 2012 London Olympic Games is approaching us, Galaxy S III is also near us. An anonymous message says that the Galaxy S III conference was scheduled on May 3 at London, UK, this year's Olympic Games host city.According to the information previously circulated, Samsung Galaxy S III will have a 720p high-definition display Super AMOLED, the screen size will be between 4.6 to 4.8 inches, a...

   Samsung Galaxy S III,Release     2012-04-16 16:09:18

  New Android simulator has some big improvements

Message from the Android developer blog, the Android emulator now has a number of improvements and optimizations. It allows developers to develop applications more conveniently.The Android emulator is an important tool for Android developers developing and testing applications. Due to the rapid growth of Android hardware, the simulator has been slightly left behind. The new simulator brings some new functions including support for GPU, the CPU acceleration sensor support, multi-touch input suppo...

   Android, Simulator,GPU,OpenGL     2012-04-10 13:02:31

  Generate signed certificate from CSR in Java

In our previous tutorial, we have explained how to generate CSR which can be sent to CA for generating a signed certificate. In this tutorial, we will explain how to generate the signed certificate from CSR in Java. We will not use an actual CA but a self-signed certificate to act as a CA certificate. Since the CSR contains the subject information where a certificate needs to be generated and signed for. The key here is to extract the subject information from the CSR and then set it as the subje...

   JAVA,CSR,SIGN CERTIFICATE     2020-10-24 07:03:17

  Cybersecurity | The New Dangers That Lurk Online and Their Solutions

(Image source: Pexels) Data is one of the most important things to us. While robbers that steal valuables like laptops, phones, or money are still a threat, cybercrimes are also more dangerous than ever. That’s because your data is far more valuable than you might think. Companies benefit from users’ data by applying it for their indexing, marketing, and accumulation needs. They actively use this information to sell you more products. Have you ever visited Amazon and instantly got a ...

   DATA SECURITY,VPN     2020-04-23 06:47:37

  Oracle released an urgent Java patch

On March 23, Oracle just released an urgent Java patch which is out of its normal update schedule. The security vulnerability is related to the Java SE running in web browsers on desktops. The CVE ID for this issue is CVE-2016-0636. With the unpatched Java, attackers can remotely exploit the target system without username and credentials. Successful exploits can impact the availability, integrity, and confidentiality of the user's system. When the user access pages containing malicious code...

   JAVA,SECURITY,ORACLE,NEWS     2016-03-25 08:39:59

  Java Cipher encryption/decryption example

In Java, Cipher is the API for doing data encryption/decryption. Many cryptographic algorithms such as AES, DES, RC4 etc can be specified when creating Cipher instance. The Cipher instance calls the underlying algorithm specific implementation to do the actual encryption/decryption.  Before doing the encryption/decryption, a key needs to be created and it will be used to do the encryption/decryption. A sample program for performing all these is : import java.security.Key; import javax.cryp...

   Java, Java Security, Cipher, Example, Sample     2015-08-14 07:07:10

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