No Suitable Title Found..

Many times I have availed the Cab facility of my office whenever I got late for project work. But yesterday I got a new idea from some guys traveling with me in the same cab. In my office when I am availing cab service, its cost is going to be added on your project cost.

Introduction to Quantum Cryptography

Imagine you want to send some message to your friend and you don't want others to peek on your message. So you lock your message in a box using a key and send the box to your friend and your friend also have a key to unlock the box so he can easily unlock  the box and read the message. In general this is the technique used by any cryptographic algorithm. Locking up the message in  the box is called Encryption and Unlocking is called Decryption. Before message being sent to the receiver the data is encrypted using an encryption algorithm and a secret key. On the receiver side the encrypted data is decrypted using the reverse encryption algorithm. Classical cryptographic algorithms mostly rely on mathematical approaches to secure key transmission. The security  they offer is based upon unproven assumptions and depends on the technology available to an eavesdropper. But rapidly growing parallel technology and Quantum technology may be a threat to these classical cryptography in near future. One of the solutions of these threats is Quantum Cryptography. Now what is Quantum Cryptography? Quantum cryptography is a complex topic because it brings in to play something most people find hard to understand -- quantum mechanics. Now lets focus on some basic quantum physics that we must know to understand this article.

Use Indent to indent your C-code

I myself not very much expert in writing indented code and code without indentation looks just horrible. Of course you will not have same feelings if you are using an IDE with auto indentation facility and of course if you know how to write indented code. For this purpose I found Indent command very useful in linux. One thing you should remember that this command is only for C code.
Actually not me, one of my friend Arjun Pakrashi informed me about this command.

All expired things are not log files.

Distinction between expired unnecessary things and log files is very much vague to me.  May be for this confusion I somehow decided to keep my old expired admit card for December NET exam,2012.  One thing I should tell that I couldn't sit for this exam as my Semester exam and NET exam collided. Whatever I got another chance for the exam in June,2013 as the exam holds twice a year. Just before the exam when the exam centers were published then I found that my center is "South calcutta girl's College". Then I searched the college in Google Map and the route to it. Till  then I had no problem. But on the day of exam before going to the centre I somehow decided to match the center with the printed copy of my Admit card. Then I  found that my center is not the above specified college but another one. I didn't have enough time to search the college and go there. Luckily one of my friend Subhajit Ganguly told me that he knows the college and it was near. Then I found that the admit card I was matching for my center was of the december,12 and according to that expired admit card my exam center was South Calcutta girl's College.  However I was lucky enough that the college was not far.

Falling in Love

Every body says "I fall in love" or "He fell in love". Why people falls in love? Is there any reason behind it?

Are we machine?

The topic I am going to share may seem to you funny and induced by some movie.  Many times our topic of discussion was distinction between the machine and Human. Some people argues that the things that distinguishes us from the machines are power to think,power to feel. I can feel pity on someone and I may help him though I was instructed to harm him, but a machine can't,It will do as it was instructed. It feels reasonable upto certain distance to me. Yes machine can not feel and can't think. Wait a minute are we sure that machine can't think? Actually I believe machines can think provided that they are given the power to think. How we do something? We observe the situation then analyse the situation and decides to do some thing. Machine also performs some  tasks just in the same way we do. Actually we tells them through their design how to perceive the situation and how to analyse the situation. But you may think our thinking power is not manipulated by some others or it is not pre determined that how we will react to a situation or we are?.  We all know about genes and how it controls our behaviour and characteristics. Is it not same as the embedding controls in machines design? I think as we embeds control information in a machine, our control information is also embedded in our gene. Actually all the things we do are governed by some rule. Same for how we feel. Maybe how we will feel something or someone is all embedded in our  gene. In which situation will we cry or laugh is predetermined, which food will we like, what kind of movie or songs will we like or which kind of people will we like is all predetermined. We are just following the rules according to the situation. If we are feeling sympathy on someone or even falling in love of someone, we are just following the rules. If we can design a machine where we can embed all these kind of control instruction then machines will act as human acts. But due to our limited knowledge we have not been able to read all kind of instructions in our gene, but when we will be able to that we might design a machine that will act as a human accurately. So all that I want to say is that Human body is a big and complex machine (may be controlled by some other ).

Way back to home

On the occasion of Holi, we all were returning home for the holidays from BHU. Though the holidays were of three days we extended it to 7 days. As we have nothing but a project work in this final semester so we didn't got much problem to extend the vacation. We had reserved our tickets one month before the holidays. Our train time was on the very dawn so I decided not to sleep at night and sleep on the train. Generally we sleeps not before 3 to 4 a.m , so I decided better not to sleep as it will be painful to wake up so early. As we are on the last semester and we must leave the hostel just after the semester examination we had a lots of luggage (mainly winter clothing ) with us to reduce the unnecessary things on hostel. The train was on time but the compartments were so crowded that it took us near about half of an hour to reach our seat. Of course most of the people didn't have legal tickets otherwise compartment would not be so crowded. When we reached our seats we found those well occupied by others without a valid ticket. It was their greatness that they offered us to seat on our reserved seat. Seating on that overcrowded compartment with a scorching sun I decided never to reserve any train ticket that runs on day time. However the train took us to our destination on time. From that place we all will go on different ways. I had to take another train that will take me to home. I had some notes of hundred rupees and change of four rupees only. But unfortunately my ticket was of fifteen rupees and the counter responded as I feared “get a change of one rupee” . Now I was on real trouble. I had two weighty luggage bags and also my laptop bag. Where should I get a change of hundred rupees? For that purpose I need to go to the nearby stalls and buy something. But with those heavy bags I found it hard to find my way to the stalls as in Howrah station stalls are at a distance from the station and to access the stalls that are inside the station I need a ticket which I didn't have at that time. So I waited there for some time then a man came to me to ask me if I need reservation tickets. I told him about my misery and it is kind of him that the man gave me one rupee. Then I got my ticket and went to the platform to take train. It was late enough. If I am late much then I will not get any bus from the rail station. Then I heard that most of the trains have been cancelled on our route due to the maintenance work on a particular station of that route. Then I waited for the last train with all other people, no, I better say a crowd that can't be fitted on a single train. As obvious I couldn't even reach the train. Then what? One of the last options. I went to room of my brother and next day in the morning I and my brother both went home. Really the journey was very tiresome.

Terminal

I never tried to write blogs before. After continuous motivation from Arjun Pakrashi (one of my close friends ), starting to write blog posts. I just watched the movie The Terminal by Steven Spielberg. Each movie by him, that I have seen are just his genius creation. In this movie central character Tom Hanks is just awesome. Actually all his movies are just awesome. This is a story of a man Victor Navorski from Krakozhia. He came to know that his country has suspended all travelling privileges on passports as a result of military coup in his country. Airport authority allows him to enter International Transit Lounge until all the problems are sorted out. Then he stumbles upon everything he tries to do there mostly because of his poor English. Gradually he starts to adjust with the area and its people. Meanwhile  he helps a man from Russia carying medicines for his dying father and becomes popular. He meets Amelia and slowly falls in her love. Director beautifully showed all the emotions of Victor, regarding his country, Amelia and all his terminal friends. He nicely pictured the situations where Victor faced various problems. He spends a long time in that lounge just to get a chance to go USA and get a signature from Benny Golson which his father did'nt get. Most of the part of the story took place in that airport lounge and demonstrated beautifully with all the feelings and details which the Steven Spielberg always does with his movie.