What encryption standard is Microsoft Active Sync using

I know exchange activesync is using SSL encryption to transmit it's data (at least that's what the checkbox says is it TLS?). But I couldn't find anywhere where it documented what version of SSL or well anything about the encrypted tunnel at all.

does anyone know or could point me to a document that explains their encryption?
ccsoitd1Asked:
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Zephyr ICTCloud ArchitectCommented:
I think it's 128-bit SSL, that's all what I know about it, it's not the most secure solution for sure ... A few companies I know combine it with a VPN connection on top of EAS, to bring it that extra layer of security.
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ccsoitd1Author Commented:
@spravtek
yeah we may end up having to go that route I was just hoping it was documented somewhere so it would be easier to justify the cost and overhead of the VPN.
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Zephyr ICTCloud ArchitectCommented:
Not that I have seen... I mean I haven't found any docs going into detail on that specific subject.
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Simon Butler (Sembee)ConsultantCommented:
You aren't going to find anything about ActiveSync directly. ActiveSync is just an HTTPS connection, nothing more than that. Therefore the encryption standards etc are all based on what you have configured within your web server.

Most certificates are not 2048bit, and in most cases it will be at least 128k but can be 256k. However it is also dependant on the ActiveSync client. If you are using something modern, you can probably use 256k, however if you are still allowing old iPhones etc then you could be limited.

It is all about the web server, not ActiveSync.

Simon.
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