Dynamic Tag Identity-Based Encryption Scheme for Logistic Systems

In recent years, there is an increasing interest in harbor security and safety due to growing threats by international terrorism. There have been many efforts to cope with international terrorism on the harbor and transport. One of these efforts, department of homeland security of USA has been tried to make a CSD (conveyance security device) security standard such as ISO 18185 to achieve secure transport and logistics. However, since the CSD security standard is based on the symmetric key cryptosystem, which requires the centralized key management system, the CSD security is not widely used for logistic security. It is known that current CSD security standard has difficulty in mutual authentication and signature generation/verification. If we use the PKI (Public Key Infrastructure) based public key cryptosystem for CSD security, we can use the authentication and key management capabilities more easily in eSeal and CSD logistics applications. However, the PKI requires high computational cost, communication overhead, and high storage cost. In this reason, we propose a novel public key cryptosystem for logistics security, which is called dynamic tag ID-based encryption scheme. The proposed scheme requires a trusted agency (TA) to reduce the storage and communication overhead. It is more efficient than conventional PKI cryptosystem from the viewpoint of communication cost because proposed scheme communicates only between tags and TA. Also since proposed scheme does not require storage for a certificate, it is more efficient than conventional PKI based cryptosystem from the point of storage usage.