1. What are the contributions in "Collector: a secure rfid-enabled batch recall protocol" ?
The recent development of Radio Frequency Identification ( RFID ) provides us a promising opportunity to implement batch recall in an accurate and efficient way.. In this paper, the authors thoroughly study the security aspects and identify the unique requirements in RFID-enabled batch recall.. The authors propose a practically secure protocol, COLLECTOR, to enable accurate, secure and efficient RFID batch recall.. RFID-enabled batch recall provides us the opportunity to further enhance the security of batch recall operation, allowing us to achieve recognition of problematic products, privacy preserving of production pattern, recall authentication and non-repudiation, etc.
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2. Why does the Ci generate a recall message without the secret key?
Due to the confidentiality of symmetric encryption scheme, the Ci cannot decrypt the recall message of the product without the secret key.
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3. What is the process of tracing a defective product?
Tracking phase is event-driven: when receiving a reported problematic end-product from a customer Ci, T cooperates with the intermediate manufacturer set {ti} to trace the batch number of the problematic intermediate batch contributed to this product.
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4. What is the cost of storing the key and secret key?
In the first two phases, namely production phase and distribution phase, the end manufacturer T needs to securely store a signing key and a secret key K of a symmetric encryption scheme for each of its batches (contained in the batch records).
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