[gliese1337]

Typical block ciphers generally require adding padding, which increases the number of bytes that need to be transmitted. But that's negligible for any significant amount of data. I don't think it would ever noticeably increase bandwidth requirements.

[zAy0LfpBZLC8mAC]

Well, counter mode is probably a better idea anyhow--but neither 16 bytes of padding per frame nor the same amount of MAC will be an actual bandwidth problem.