On Mon, Nov 7, 2011 at 6:17 AM, Tim <ignored_mail...@yahoo.com.au> wrote:
> With suspend and hibernate, the computer stores everything that it's > currently doing (documents your reading/editing, pages you're browsing, > etc), so that when you wake the computer up, you resume from where you > left off. > > Hibernate stores it to hard drive, and the next bootup will read this > and resume, automatically. > > Suspend does it to RAM. So your computer needs (minimal) power > continuously available to it, to keep what it's stuffed into memory. If > the memory is lost, then the next boot will be a cold boot. > But without intentionally deleting memory, how could it be lost except for the case that power has gone and I am not using UPS....Cold boot simply means that it doesn't need credentials to log-on? > When it works, resuming from a suspend can be quicker. Hence why the > riskier option exists. > > Both are security hazards, though. If you have an encrypted system, to > protect you against what a thief could do with your data, being able to > resume makes it easier for them to crack in. Because resume will only > ask you for a log on password, the cold boot decrypt password query was > answered, by you, when you originally booted up. > But still how thief can log-in when I have encrypted password, password necessary to boot in, disabled booting via CD-rom, disabled booting via usb. Still chances are there that the thief can crack in ? Some sort of hardware token, such as a key that must be inserted while > booting, but is kept separate from the computer, is the simplest way to > avoid that problem. > This I didn't understand how to achieve, but thanks for the above explanation. Now, I know the difference between Hibernation and Suspension. Would prefer it now. -- THX
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