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DNA explainer: What is 'postcard privacy' and how are tech companies misusing your personal data?

The new privacy update notification of popular messaging app Whatsapp has raised serious concerns over the privacy and storage of data by tech companies with many demanding that the governments across the world should make tough laws to make these tech companies accountable.

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The new privacy update notification of popular messaging app Whatsapp has raised serious concerns over the privacy and storage of data by tech companies with many demanding that the governments across the world should make tough laws to make these tech companies accountable.

It will not be wrong to say that in this era of social media, you have as much privacy as there was in the message sent from the Postcard. Many people have used Postcard to send a message to someone. Anyone could read your message written on these Postcards and and to do this they did not even need to take any kind of Permission from you. This is now the same with your data and your privacy. 

Later, inland letter was introduced to safeguard your privacy. The inland letter was closed from all four sides and your message was safe inside it. Similarly, End-To-End Encryption was also claimed in many messaging apps but by changing their policy from time to time, these tech companies have got access to all your messages.

Google is one of the largest tech companies in the world. You must have seen the library in your school or college, similarly Google also has a library of your data. Generally, Google has data up to 2 Giga-Byte about each of its users. And in this, data of about 18 lakh pages or equivalent to 9 thousand books can be kept.

In this data, your Internet history, the videos you watch, where you go and what you search on Google, everything is present. If you use Google's Gmail service, then your Emails, all your files and Draft mail in it are also collected, which you have not even sent to anyone.

Google keeps all your information with itself and it create a profile using your data. And using that profile, you are shown digital ads of your choice. With the help of these digital advertisements, Google has become one of the largest and highest grossing tech companies in the world.

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