howtogeek — 2013-12-25T07:00:21-05:00 — #1
Originally published at: http://www.howtogeek.com/178277/htg-explains-does-clearing-your-browser-history-really-delete-it/
You spend some time surfing the web, close your browser, and clear your internet history. But is your history really deleted, and is there any way to find out what websites you visited? Read on to see several ways that your deleted browser history can be recovered.
peter — 2013-12-25T12:47:06-05:00 — #2
So, if I am correct, you are saying that Ccleaner does not clear all Internet cache? It is still retrievable?
wysir — 2013-12-26T12:13:31-05:00 — #3
CCleaner works like using the recycle bin, except targeting specific file locations rather than you manually moving them to the recycle bin and deleting them. Thus all it really removes is the 'pointers' to those files from the MBR. The physical data is still there on your hard drive until it is overwritten, waiting to be overwritten. Software such as Recuva can scan for and recover this data that still has yet to be overwritten. The process to perma-delete data is a much more time-oriented task, which is why very few people do this by default. Safely Perma-deleting files is not just replacing all the 1s and 0s with 0s, because past 'x amount' of writes can be recovered by hard drive forensics. Programs such as Eraser allow you to overwrite deleted data with randomized 1s and zeros, even multiple passes of 1s and zeros in order to hide formerly deleted data.
I have my browsers set to automatically clear everything but form data in order to keep my browsers fast and functional while also automatically deleting most tracking cookies.
lucas_hunt — 2013-12-27T17:54:45-05:00 — #4
Wysir, you are supposing that a magnetic memory of 1s and 0s is like recovering words written on a piece of paper. It is not. If you write something on a piece of paper, erase it and write over it, there are 26 letters, 10 digits and a limited number of other symbols that you could recover to create words that mean something in a given language. On a magnetic disk there is a 1 or a 0. And that piece of material has hosted a 1 or 0 many times over, so there is no telling which imprint (if there is one) would correspond to the latest writing pass or some distant writing pass. Of course my rebuttal is obtuse because there is no leftover imprint of a prior 1 or 0 anyway. One pass of 0s will do on modern machines. there is actually an old HTG article talking of the ancient computers where many pases were helpful.
wysir — 2013-12-30T17:22:14-05:00 — #5
You are correct. I was thinking of laser writing to CDs/DVDs, not magnetic hard drives.
system — 2014-01-04T07:00:25-05:00 — #6
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