A method of increasing communication security may include receiving, from a first computer system at a second computer system, a Constrained Application Protocol (CoAP) message, wherein the CoAP message may include authentication data. Message validation may be performed based on the authentication data, wherein the performing message validation may include determining that the CoAP message is invalid if at least one condition is not met. The method may also include performing, if the CoAP message is valid, at least one operation associated with the CoAP message.