I received some fearful feedback on my last blog entry about “delete all”. A friend told me that he had stopped using his bonus or credit cards for buying groceries as he recently was asked to participate in a consumer research project based on his shopping habits. So the retailer knew about his preferences because of his card. This highlights the first problem of data in the digital age: as long as we pay with cards or buy online we leave a trace of data everywhere. Only cash is safe.
Furthermore, anything you send via a network like the internet or your company network will be stored either by your computer, the network or any data mining system like Google or Yahoo. So better think twice before you send something sensitive via the internet and definitely do not use your company email. You better make sure you get rid of all the data on your own computer because deleting it only will not do the job. Your computer retains the information as you easily can find out if you use a data-retrieval program. A sure way of deleting all the unwanted information on your computer, memory stick, external hard disk etc. is to use an erasure program like Space Eraser.
The third problem is that the government or other authorities collect history about you. In Switzerland if a bank or an asset manager thinks you are a criminal, for example they suspect you of money laundering, the federal police will put you on a “blacklist”. You can ask the police if you are on the list but not why or how you got on it. Even if you are innocent you will stay on the list. If you are on it you will very likely stay on it for a long time. The same if the FBI, CIA or any other clandestine government organization think that you are a terrorist and put you on a list. All of a sudden you could be barred from flying or the like. Unfortunately there is no solution to this problem yet.
And by the way: the next time you upload data, text, pictures or comments on YouTube, Flickr, Picasa or Facebook, better think twice. It will be stored forever!
Read more (in German) on data-security here:
http://de.news.yahoo.com/gp/20080102/ttc-wann-sind-geloeschte-daten-wirklich-a8a9a5f_1.html
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