Ivan Prenosil wrote:

>>It was my understanding that a Blob Filter would process the data as it
>>is written into the Blob, compress it or encode it, and then uncompress
>>or unencode when the blob is read out.
>>
>>This is supposed to be a way to make sensitive data more secure, so that
>>without the filter, a copy of the database would be of little use.
>
> Do you allow anybody to copy the database ??

This is all hypothetical - I'm working on my paper about MySQL to
Firebird conversion, and this seemed the ideal way to include some
functions that are built into MySQL.

> In that case I guess you allow to copy blob filter udf too,
> and then such encryption has no sense.
> (Unless you compile blob filter such that it runs only on specific computer.)

Now that is not a bad idea - smart card key card perhaps, so only a
specific machine can read the data ?

--
Lester Caine
-----------------------------
L.S.Caine Electronic Services