ACCESS 2010 ENCRYPTION PERFORMANCE

Hi All
does anyone have a simple answer regarding the Encrypt database option.
Specifically (and ref the ominous message re row-level locking), does it impact performance, or negate the notification re 'changed by someone else ..'?

In a multi-user environment, is encryption OK?

thank you
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COACHMAN99Asked:
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Jim Dettman (Microsoft MVP/ EE MVE)President / OwnerCommented:
<<does it impact performance>>

Yes.  Everything gets un-encrypted and encrypted on the fly.  You don't get something for nothing.

<<, or negate the notification re 'changed by someone else ..'?>>

 It doesn't change anything else.  All it means is that when stored on disk, the data is encrypted.  

 Locking and all other functions are the same.

Jim.
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COACHMAN99Author Commented:
OK Thanks Jeff. (I'm assuming low % impact on performance when 10 concurrent users?)
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Jim Dettman (Microsoft MVP/ EE MVE)President / OwnerCommented:
Depends on a number of factors; available CPU, amount of data, pattern of usage, etc.

It's not the type of thing that it's easy to say if it will have a large or small impact other then trying it.

 The only thing you can state for certain is that it will result in less performance if it's turned on.

Jim.
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COACHMAN99Author Commented:
cheers Jim.
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DatabaseMX (Joe Anderson - Microsoft Access MVP)Database Architect / Systems AnalystCommented:
Jim ... did encryption change in A2010? Because in <=A2003, all it did was ... say you opened an MDB in Word ... it would be *totally unreadable* ... as I recall.

Are you saying now that it actually encrypts data ?

mx
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Jim Dettman (Microsoft MVP/ EE MVE)President / OwnerCommented:
MX,

  Not sure what you mean, Access has always had the ability to encrypt and if you did, the data was unreadable.

  But yes, the encryption method was changed int he past couple of releases (Believe it was A2010) because the old method had become crackable.

Jim.
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DatabaseMX (Joe Anderson - Microsoft Access MVP)Database Architect / Systems AnalystCommented:
I don't recall ... Encryption from with in the Access UI ... every actually encrypting data. Are you positive about that ? I assume you have tried it ?
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Jim Dettman (Microsoft MVP/ EE MVE)President / OwnerCommented:
Yes.   In an un-encrypted DB, you could take Word and open the db and read the fields.   Yes, there would be a lot of junk, but if you understand the structure, you can read the data.

With encryption turned on, you can't read the pages at all.

Jim.
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DatabaseMX (Joe Anderson - Microsoft Access MVP)Database Architect / Systems AnalystCommented:
Understood. But ... if you ... say were to Encrypt a BE data db - and send it to me - and I open it with Access - is the data going to be encrypted ?
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COACHMAN99Author Commented:
If you cant read the data with an 'external' editor e.g. Word, then it must be encrypted.
and, if you open it using the password then your 'view' is un-encrypted,
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