Transmission across asynchronous communication channels can be subjected to delay injection attacks. Delay injection attacks cause arbitrary skews - arbitrary numbers of transmitted signals can arrive after the first signal of the next transmission has arrived. The (common) assumption that all signals form the i^th transmission arrive at the decoder before any signal from the (i + 2)^th transmission arrives is called a no switch assumption. This paper presents a self-synchronizing zero-latency coding scheme that requires no acknowledge and can perfectly decode any transmission distorted by an arbitrary skew that obeys the no switch assumption.