Sunday, October 25, 2009

Stay safe online - SSO




 In this post i will promote the web's stay safe online.
visit this site http://staysafeonline.org/content/free-security-check-ups here you can find how to stay safe online... also you will have a list of free computer risk checking websites.

Thanks and kind regards,

P.Jerald

Sunday, September 27, 2009

Difference between http and https

What is https? Why we need https? is https safe from hacker?



We all have this question in our minds. I also have this same question in my mind. Now in this post i will explain this. Http stands for Hypertext transfer protocol which is a language a computer can speak with another computer. And what is Https? This is simply, http over ssl or http secure. The same web language used with data security.

We all use internet connection for browsing, emailing, bank transactions and many more. In these activities, some information we share throught the web is private and some information is public. If a hacker finds a email message you send to your friend may not cause any problem. But consider if you are connecting to a banks website and entering your password. This password is going through the internet and the messag can be hacked intermediately and a hacker can know your password. Just imagine what will happen. Your private data is now public to some hacker in the middle.

Consider the normal http connection to a bank website:
what is http

Here is the data security plays a main role. In a https connection, a public key and a private key is used. When a browser requests a web page to the server, it will serve the html content and a public key will also be serverd along with the html content. This public key will be used to encrypt the data entered by the user and this is send through the internet.

what is htttps

See when you are connecting to a banks website through https connection, the server in bank will serve the web page(some html file/content) to your computer's browser and also a public key. Your browser will display the html content in a formatted manner. Probably bank's login page will be displayed. Now you have to login to your internet account to access your bank account. While you enter your password and click submit, the data will be encrypted by your browser using the publick key which is already received and submitted throught the internet to the assossociated server. Then the server will process your request and it will let you to access your account or deny to access your account. In this transaction, if a hacker see the encrypted password he cannot able to decrypt it although he is provided with the public key. Because this public key is used to encrypt and it will not decrypt the data. Private key alone decrypt the data. This private is available in the bank's server. Yae!!!! have you understand?

Okay i think i have cleared your doubts. Now here comes the second question. How to know a website use https connection. You can easily find this by seeing the url in address bar. There will be https instead of http. Some good browsers internet explorer, firefox , safari, google chrome and opera will show who gave this https public key and private key to the website owner. It also checks if these keys belong to this website owner by refering the website name and the key's name. A website owner should buy a https certificate. This certificate consists of a private key and a public key. Each private and public key corresponds to one certificate only. This certificate has a expiry date also.

Monday, August 31, 2009

How to buy gold

I share some tips on "how to buy gold" that i read on times of india news paper.

Did you know that indian households collectively have at least 40,000 tonnes of gold while Fort Knox in th US has ony 16,600 tonnes of gold, and the RBI about 600 tonnes of gold?

The Carob trees in Egypt throw millions of seeds into the desert before it rains. All the seeds have the same weight known as carat. Due to the undeveloped arithmetic, 24 was maximum in gold-rich Egypt at that time, compared to our 100. S0 22 of theirs means 91.6%, which is represented as 916/1000, the figure used to represent ornament gold of 22 carats. Pricing, billing, weight and quality are areas you must be alert while buying gold.

Wastage is inevitable in melting and designing and in adding two carats of copper. If a jeweller claims that he does not charge you for wastage and making charges, then it is unfair trade practice. A sinple calculation will reveal the truth. You divide the final payment made for the end product, say 16,580, by the gross weight of the jewel you bought, say 10 gram, and you get Rs 1658 per gram while the rate of gold is Rs 1382 per gram. The extra, roughly 20% or so depending on the design, is what you pay for wastage and labour. The price of gold is fixed by the jewellers of the town in relation to metro prices but making charges and labour are fixed by the jeweller.

If it is gold ornament studded with stones, you must insist that the jeweller mention in the bill seperately the weight and price of stones. If the gold weighs 10 gm and stone 1.5 gm, check if the bill is for 11.5 gm multiplied by the price of the gold per gram. If you do not do that, you will end up paying price of the gold for the weight of the stone.

Some jewellers would mislead you by telling that the billing would entail heavy tax and hence you have a hand written estimate passing off foe a bill. The tax for gold ornament is only 1%. For a jewell that costs Rs.14,300, that tax is only Rs 143. You can happily pay the tax for the protection the bill gives.

It would worthwhile to check the weight of any gold ornament in what is called the arbitrators' shop which functions soley to weigh the ornaments for a nominal sum. As this is run by jewellers' Association, its weighment is accepted by all jewellers in case of dispute.

Hall marking that vouches for quality has been introduced by Bureau of Indian Strandards(BIS). In major towns, there is/are hall marking centers(privately run) to which the jewellers send each ornament to get stamped. BIS at best may periodically check. Hall marking costs you Rs 100 more. For small purchases jewellers may reduce this. Jewellers are free to sell jewellery that does not have hall mark also. Please note that hall marking by itself does not mean that the gold is 22 carats. One can have a hall marking for 14, 18, 20 carats also.

So how are you to know what you buy is of 22 carats? You must learn to read the marks. The first is the BIS symbol. the number 916 stands for 22 carats. If it is 585, it is 14 carats, If it is 750, It is 18 carat and so on.

The next three letters indicate the name of the hall marking centre. BHC means Bharat Hall Marking centre. The next letter, "K" is the code for the year(2009) of the design and make. J stands for 2008 and L stands for 2010. The last emblem is is that of the jeweller's shop. For instance, Ng stands for N Golpaldass, Tiruchi. Where does one find all this? In the inner surface of the ornament. One requires a magnifying glass. As it will always be near by in a jeweller's shop you can ask for it and look. If the jeweller is not co-operative, just walk away.



Thanks and kind regards,

P.Jerald

Saturday, July 25, 2009

Google Talk Tips

Tip no 1 )

Bold Text - To write something bold, you can use an asterisk character before and after the word, like "*this*" .


Tip no 2 )

# Italic Text - To use italics, use an underscore character before an after the word, like "_this_"


Thanks and kind regards,

P.Jerald