About




Something you might want to know

 Hi, my name is Handra. I am a software engineer, currently having a role in managing a team of software engineers, focusing on the Public Key Infrastructure (PKI) technology.

I have experience as well in mobile application development as I have previously worked as a Mobile Application Developer (Android and iOS) at Virtual Map (Australia) Pty. Ltd. and as Lab Assistant at Software Laboratory Centre, BiNus University, Jakarta, Indonesia. I worked there for 4 years before continuing my career path as a software engineer.

 I have graduated from BiNus University majoring in Information Technology for my undergraduate study and Master of Information System Management for my graduate study.

 I think that’s all about my self. Enjoy this site and I really appreciate your feedback that you can send to me by email to address handra@handracs.info. Thanks for visiting my website and hope you can gain as much knowledge as possible.

Popular posts from this blog

Public Key Infrastructure Fundamental (Part 2)

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This post is a continuation (par 2) of my post that can be found here . In this post, I am going to discuss about Public Key and Private Key . Public Key Public key can be defined as a value provided by some designated authority as an encryption key that, combined with a private key derived from the public key, can be used to effectively encrypt messages and digital signatures. Private key will be discussed below. Private Key Private key can be defined as an encryption/decryption key known only to the party or parties that exchange secret messages. Public-key Encryption Source: Globus As you can see from the above image, the public-key and private-key are both used in the encryption process in the PKI. One think you need to remember, we use the receiver's public-key as the key to encrypt the message. On the other side, the receiver, will decrypt the message using the private-key that he has. To simplify things: Think of a public key as being the lock. It’s no...
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Simple Paging

Paging literally means making data displayed in multiple pages. Paging is used specially for website, where displaying large amount of data can be so troublesome by making the downloaded data bigger and thus increasing the response time. Paging can be done in many ways. In this tutorial, I would like to show you a very simple method we can use to do the paging. Here, we just need to enable the user to move to the next page (if any) and back to the previous page (if any). Also, for the sake of simplicity, I will use dummy data stored hard-codedly into an array. However, the concept is similar. OK, let's start !!! /* Maximum number of items to show, per page */ $maxItemPerPage = 10 ; /* * Prepare the dummy data * Used just for the sake of this tutorial. */ $data = array ( ) ; for ( $i = 1 ; $i <= 112 ; $i ++ ) array_push( $data , "Item " . $i ) ; First of all, we define the maximum number of items to show per page. In...
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Einstein vs Professor

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This story is retrieved from the Internet. Though the authenticity of this conversation is still in question, it's still worth it to read. Enjoy. Professor : You are a Christian, aren’t you, son ? Student : Yes, sir. Professor : So, you believe in GOD ? Student : Absolutely, sir. Professor : Is GOD good ? Student : Sure. Professor : Is GOD all powerful ? Student : Yes. Professor : My brother died of cancer even though he prayed to GOD to heal him. Most of us would attempt to help others who are ill. But GOD didn’t. How is this GOD good then? Hmm? (Student was silent.) Professor : You can’t answer, can you ? Let’s start again, young fella. Is GOD good? Student : Yes. Professor : Is satan good ? Student : No. Professor : Where does satan come from ? Student : From … GOD … Professor : That’s right. Tell me son, is there evil in this world? Student : Yes. Professor : Evil is everywhere, isn’t it ? And GOD did make everything. Correct? Student : Yes. Pr...
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