Freezing computer ram

Is it true that you can extract data from a computer's RAM by freezing it? How do you do it? Yes.


It  is a technique known as cold boot attack , used in computer forensics,  in data recovery procedures and inevitably in illegal hacking  activities.

It takes advantage of a physical characteristic of  RAM banks, in particular of DRAMs, which by their very nature do not  immediately lose data in the face of a sudden power failure but follow a  sort of discharge that is much slower as the electronic components are  colder.

In a nutshell, the RAM loses its content in a time proportional to the temperature.

In  normal and steady-state conditions we talk about a few milliseconds,  but if it is cooled below -50 ° C (for example through a can like those  on the market) the discharge time can even reach a few tens of seconds.

That  time is enough to detach it from the motherboard, place it on another  PC and read its contents through an appropriate tool that dumps it .

Recalling  that except in rare cases (1) the RAM is never encrypted unlike the  filesystem, (2) which often contains temporarily the keys used by the  security systems and (3) that everything you are doing is momentarily  positioned right there ( such as what I am currently writing here on  quora before posting the content), it is clear that as a technique,  although it requires physical access to the computer, it is particularly  intriguing not only for completely legitimate activities. 


computer memory

Additional Information

As a computer student , if we are asked about the opposite term for RAM , the obvious answer is ROM.

So here we are just sharing some thoughts on why your ROM is also a RAM !

RAM or random access memory refers to the method by which the data  is accessed   from  your memory .  Random Access means data can be  accessed from your memory in a random manner , ie in any order  irrespective of the order in which you are storing the data .

The opposite  term for RAM is Sequential access memory or SAM . ie  data can be accessed from that kind of media in a sequential l manner  only . Tape drives are classic examples of SAM.

So back to our point , all the electronic memories you are using in  computers can access data randomly so we can call them RAM.  primarily  There are two types of  RAM available , the Read Write -RAM and Read  Only -RAM , ie RW-RAM and RO-RAM. According to the normal usable of the  term , we prefer to call the RW-RAM as just RAMs and RO-RAMs as ROMs.

So bear in mind the fact that  ROM is also a RAM , but for your examinations , do not  go for this story if you are expecting an A grade for your computer paper 


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