Encryption algorithm in SAP PI SOAP Adapter (Receiver)

Hi,

Within SAP PI SOAP Adapter (Receiver), if Web Services Security is selected for OASIS, does anyone know what encryption algorithm it uses by default?

I notice in SAP PO in the ICO there is an option to select an encryption algorithm (e.g. 3DES, RC2*, AES*) but that option doesn't exist in SAP PI (Receiver Agreement).

Many Thanks,
Gareth