We did some testing on this a couple years ago... trust-e showed no statistically significant boost with where we placed it. We had tested the 'hacker safe' lo

We did some testing on this a couple years ago... trust-e showed no statistically significant boost with where we placed it. We had tested the 'hacker safe' logo ( that mcaffee since bought and renamed ). Depending on where it was placed in the order process ( it was a multiple step process ), it either had no noticeable effect to a 15% conversion boost. For customers outside the US, neither had any impact at all, where we tested them. For the hacker safe logo, it had the biggest effect when placed near product selection and when the user was entering credit card information. I would suggest doing some serious a/b testing to figure out where the logos should go if you get them as from my experience, placement is everything.