Provided is a system, method, and computer program product for conducting secure transactions with at least two appliances. The method includes monitoring audio data with a first appliance including a processor, a speaker, and a microphone; detecting, with the first appliance, an audible request to initiate a transaction from a user from the audio data; communicating, with the first appliance, a transaction request to at least one remote server in response to detecting the audible request to initiate the transaction; detecting, with the first appliance, a credential message received by the first appliance directly from a second appliance via an audio transmission, the credential message corresponding to the transaction request and including a limited use key provided to the second appliance from the at least one remote server or another remote server; and in response to detecting the credential message, initiating, with the first appliance, the transaction based on the limited use key.