At the 2012 Summer Olympics, Rudenko competed for the second time in the women's 100 m backstroke, by downing her FINA B-cut to 1:02.60 at the Kazakhstan Open. Rudenko touched behind the leader Tao Li of Singapore on the initial length in heat two, before fading down the stretch to save the seventh spot in 1:03.64, missing the semifinals with a much improved, thirty-eighth overall placement in the prelims.