E-Coin-Based Priced Oblivious Transfer with a Fast Item Retrieval
Priced oblivious transfer (POT) is a cryptographic protocol designed for privacy-preserving e-commerce of digital content. It involves two parties: the merchant, who provides a set of priced items as input, and a customer, who acquires one of them. After the protocol has run, the customer obtains th...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-03-01
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| Series: | Cryptography |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2410-387X/8/1/10 |
| _version_ | 1797241496269750272 |
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| author | Francesc Sebé Sergi Simón |
| author_facet | Francesc Sebé Sergi Simón |
| author_sort | Francesc Sebé |
| collection | DOAJ |
| description | Priced oblivious transfer (POT) is a cryptographic protocol designed for privacy-preserving e-commerce of digital content. It involves two parties: the merchant, who provides a set of priced items as input, and a customer, who acquires one of them. After the protocol has run, the customer obtains the item they chose, while the merchant cannot determine which one. Moreover, the protocol guarantees that the customer gets the content only if they have paid the price established by the merchant. In a recent paper, the authors proposed a POT system where the payments employed e-coin transactions. The strong point of the proposal was the absence of zero-knowledge proofs required in preceding systems to guarantee the correctness of payments. In this paper, we propose a novel e-coin-based POT system with a fast item retrieval procedure whose running time does not depend on the number of items for sale. This is an improvement over the aforementioned existing proposal whose execution time becomes prohibitively long when the catalog is extensive. The use of zero-knowledge proofs is neither required. |
| first_indexed | 2024-04-24T18:24:15Z |
| format | Article |
| id | doaj.art-213c24859a70420185dcd161ab12b25b |
| institution | Directory Open Access Journal |
| issn | 2410-387X |
| language | English |
| last_indexed | 2024-04-24T18:24:15Z |
| publishDate | 2024-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Cryptography |
| spelling | doaj.art-213c24859a70420185dcd161ab12b25b2024-03-27T13:32:20ZengMDPI AGCryptography2410-387X2024-03-01811010.3390/cryptography8010010E-Coin-Based Priced Oblivious Transfer with a Fast Item RetrievalFrancesc Sebé0Sergi Simón1Department of Mathematics, University of Lleida, C. Jaume II, 69, E-25001 Lleida, SpainDepartment of Mathematics, University of Lleida, C. Jaume II, 69, E-25001 Lleida, SpainPriced oblivious transfer (POT) is a cryptographic protocol designed for privacy-preserving e-commerce of digital content. It involves two parties: the merchant, who provides a set of priced items as input, and a customer, who acquires one of them. After the protocol has run, the customer obtains the item they chose, while the merchant cannot determine which one. Moreover, the protocol guarantees that the customer gets the content only if they have paid the price established by the merchant. In a recent paper, the authors proposed a POT system where the payments employed e-coin transactions. The strong point of the proposal was the absence of zero-knowledge proofs required in preceding systems to guarantee the correctness of payments. In this paper, we propose a novel e-coin-based POT system with a fast item retrieval procedure whose running time does not depend on the number of items for sale. This is an improvement over the aforementioned existing proposal whose execution time becomes prohibitively long when the catalog is extensive. The use of zero-knowledge proofs is neither required.https://www.mdpi.com/2410-387X/8/1/10cryptographypriced oblivious transferprivacy |
| spellingShingle | Francesc Sebé Sergi Simón E-Coin-Based Priced Oblivious Transfer with a Fast Item Retrieval Cryptography cryptography priced oblivious transfer privacy |
| title | E-Coin-Based Priced Oblivious Transfer with a Fast Item Retrieval |
| title_full | E-Coin-Based Priced Oblivious Transfer with a Fast Item Retrieval |
| title_fullStr | E-Coin-Based Priced Oblivious Transfer with a Fast Item Retrieval |
| title_full_unstemmed | E-Coin-Based Priced Oblivious Transfer with a Fast Item Retrieval |
| title_short | E-Coin-Based Priced Oblivious Transfer with a Fast Item Retrieval |
| title_sort | e coin based priced oblivious transfer with a fast item retrieval |
| topic | cryptography priced oblivious transfer privacy |
| url | https://www.mdpi.com/2410-387X/8/1/10 |
| work_keys_str_mv | AT francescsebe ecoinbasedpricedoblivioustransferwithafastitemretrieval AT sergisimon ecoinbasedpricedoblivioustransferwithafastitemretrieval |