I think there was something about a zip compression/uncompression blob
filter in IBPhoenix some months ago...

Carlos
http://www.warmboot.com.br
FireBase - http://www.FireBase.com.br

LC> Martijn Tonies wrote:

>>>Does anybody have any examples of the use of BLOB filters for encryption
>>>and decryption?
>>>
>>>I'm looking at ways of emulating the MySQL encryption functions ;)
>>
>> I'm not sure what BLOB filters have to do with this...
>>
>> Unless you can convince me you can actually use a blob-filter
>> with simple SQL (like with the IBX or IBO components).

LC> It was my understanding that a Blob Filter would process the data as it
LC> is written into the Blob, compress it or encode it, and then uncompress
LC> or unencode when the blob is read out.

LC> This is supposed to be a way to make sensitive data more secure, so that
LC> without the filter, a copy of the database would be of little use.

LC> Have I got it wrong? Which is quite possible :)