Privacy-Preserving Temperature Query Protocol in Cold-Chain Logistics

Cold chain logistics is a specific logistics mode under the condition of low temperature. To ensure that the temperature data security under temperature monitoring of the cold chain logistics, this paper presents a safe and accurate temperature query protocol (SafeATQ), which firstly introduces privacy preservation into the cold chain logistics temperature monitoring. Firstly, Temperature data from the aware nodes is encrypted by shared key with the monitoring center, and is computed by linear hash function and MD5 algorithm. These three types of data are uploaded to the storage node. Secondly, according to the hash results of the temperature data, storage node selects out the highest temperature data and lowest temperature data under the precondition of cipher, making sure the privacy safety of temperature data. Finally, according to the temperature data and its MD5 value, which are transmitted by storage node, the monitoring center verifies the integrity of temperature data, and makes the next step decision according to the results of the validation. Through the analysis of security and efficiency, this protocol can provide real-time accurate temperature query without leaking the high and low temperature data, ensuring the temperature requirements of the cold chain logistics.