How to setup password login after standby on mac

How can I force my macbook air to ask for the logon password after opening the lid of my laptop following a suspend/standby session?  I always suspend my laptop by simply closing the lid for convenience, by I am concerned if it gets stolen and someone can access the whole system.
abdb469Asked:
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strungCommented:
Apple>System Preference>Security> General>Require Password
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abdb469Author Commented:
How secure is data on a mac if a thief was to steal the computer but a simple logon password was enabled?  Is the disc encrypted or can they bypass the login screen somehow and connect to the hard drive / SSD still?

I notice that in the above file path, there is a disc encryption mode.  Are there any downsides to using that function?
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strungCommented:
If the Mac is not encrypted, then it is not secure at all since the password can easily be reset. If it is encrypted with File Vault, my understanding is that it is very safe.

Which OS do you have? FileVault was vastly improved with OS 10.7. In 10.6 if encrypts only the user's home folder. In 10.7 it encrypts the entire disk, and is also faster.

Try googling "FileVault".
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strungCommented:
P.S. File Vault noticeably slowed down startup and application launching on my older MacBook Pro using 10.6. Before I switched to 10.7, I bought a new MacBook Pro with a solid state drive, and it was so fast that the effect of FileVault was not noticeable. So I can't really say how much faster FileVault is in 10.7.
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abdb469Author Commented:
I'm using whatever the latest version of Lion is and I always update it.
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abdb469Author Commented:
Also under the new icloud service, am I able to sync encrypted files using this encryption method?  
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strungCommented:
I believe so.
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mccrickCommented:
File Vault is a little scary. Since all of your data gets encrypted, a minor corruption can cause total unrecoverable data loss of the entire drive. Make sure that you back up your data rather religiously (which hopefully you do already).
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abdb469Author Commented:
But surely that's no different to any other encryption method like truecrypt right?  If the file locker gets screwed, you've lost the whole contents?
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abdb469Author Commented:
any further comment?
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abdb469Author Commented:
guys?
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mccrickCommented:
Correct. You seem to understand encryption.
There is also a firmware password: http://support.apple.com/kb/HT1352

The two together should be pretty bombproof.

As for a simple logon password, that will keep honest folk honest. You can set this in the System Prefrences.
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strungCommented:
Firmware passwords are next to useless. You can remove then by removing one stick of RAM and rebooting.

If you are serious about security, File Vault is your best choice

Your next best choice is to make create an encrypted virtual disk (.img file) and store your important data on it. But that won't secure your e-mail, caches, cookies etc. where anyone seriously interested in your data would look.

Personally, I have turned on "secure delete trash" and File Vault on my computer and used a strong password. There is just too much personal information on my computer to run the risk of having it stolen.
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strungCommented:
By the way, if you use File Vault, then your Time Machine backups are also automatically encrypted.
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abdb469Author Commented:
Hoe do you do secure delete trash and how do I activate file vault?
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strungCommented:
Secure empty trash:  Pull down the Finder Menu to Preferences, and go to the Advanced Tab. Then check the box for Empty Trash Securely.

Re File vault - are you on OS 10.7 Lion?
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abdb469Author Commented:
yes, using 10.7.2

Ok I have activated secure empty trash - does this simply overwrite the sectors of the HD to make sure the data cannot be retrieved?
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strungCommented:
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abdb469Author Commented:
So any other downside to Filevault other than potentially being slightly slower?  I have the latest imac Intel i7.  Activating it, how would that change my day to day use of the iMac?  and if I also activated it on the MacBook Air, am I at risk of wearing out the SSD because of more read/writes to the drive?  

What if I copied data from the HD to a 3rd party storage (physical) dirve or even drop box, will this have any effect on the files?
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strungCommented:
I am using FileVault on a MacBook Pro with the SSD drive and don't notice any slowdown. Previously, I had a three year old MPB with a regular hard drive and OS 10.6 and found that FileVault noticeably slowed down booting and launching applications. The OS 10.7 version is supposed to be faster.

Here are some test numbers:  http://www.anandtech.com/show/4485/back-to-the-mac-os-x-107-lion-review/18
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abdb469Author Commented:
Ok but what about the other questions in my last post ie speed aside, do I need to enter more passwords or do anything differently on certain operations like copying or backing up files?
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strungCommented:
I have seen no suggestions that file vault would shorten your drive life.

Also see:  http://support.apple.com/kb/HT4790
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strungCommented:
Once file vault is enabled, it is completely transparent. It will make absolutely no difference to your day to day operations.
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