Not sure if encryption makes any difference!! When I first got my psp I hadnt set up any encryption at all on my home wireless network ( other than specific mac addresses) - I've now added wep (64bit) and the speed seems to be identical to before! Sure it's a bit slow ( for me - a very rough approx is about 5 secs to load an average page!! ) But the fact that it works /was built in at all is amazing!! For an occasional check of a favourite web page ( news, sports score, etc ) from literally anywhere around the house is a welcome bonus for me!!