Bitwise operation on secret values revealing the result only to the participants
The concept of "bitfield" is in fact irrelevant in this case since it doesn't really matter to which algebraic structure the data belongs to, at the end you're not using this structure at all, you're just treating them as bit strings.

What you're looking for is Secure Multiparty Computation (MPC). A bit more specifically, you need Two party computation (2PC). There are many techniques to achieve this but since you're working over a binary representation I recommend you to take a look at Garbled circuits or TinyOT (the latter should perform well since your circuit has low depth).

As a note, you cannot achieve this with something weaker than 2PC since computing AND gates is essentially complete for 2PC, meaning that any other solution you find could potentially imply a 2PC protocol.