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Her, Yong-Sork
- Proceedings of the Korea Society of Information Technology Applications Conference
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- 2005.11a
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- pp.247-250
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- 2005
Recently, a concept of bid-rigging is issued in electronic auction. To prevent this attack, Abe-Suzuki proposed firstly receipt-free scheme based on bidding-booth. Chen-Lee-Kim pointed out that Abe-Suzuki's scheme only provides receipt-freeness for losing bidders. Also, they introduced a new receipt-free sealed bid auction scheme using the homomorphic encryption technique. The main participants of their scheme are Auctioneer, Auction Issuer, Bidder and Seller. Bid-rigging can happen by a seller in their scheme. We propose receipt-free sealed-bid auction scheme using a universal re-encryption mixnet. For our receipt-free sealed-bid auction, we use Pseudo ID of a bidder and universal re-encryption technique of Golle et al. Also, our scheme satisfies privacy, correctness, public verifiability, non-reputation, and receipt-freeness.
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Shin, Eun-Young;Park, Jong-Gyu;Yeo, Hwan-Goo
- Ocean and Polar Research
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- v.26 no.4
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- pp.655-668
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- 2004
A taxonomic survey of the dinoflagellate family Dinophysiaceae Stein was conducted on 17 locations off the coast of Korea. A total of twelve species have been identified and described, of which eight species, Dinophysis dens Pavillart D. infundibulus Schiller, D. irregulare Lebour, D. lapidistrigiliformis Abe, D. mitra(Schutt) Abe vel Balech, D. parvula(Schutt) Jorgensen, D. rapa(Stein) Balech, Phalacroma sphaeroideum Schiller, are new records for Korea and six are potentially toxic.
https://doi.org/10.4217/OPR.2004.26.4.655 인용 PDF

Muller, Sascha;Katzenbeisser, Stefan;Eckert, Claudia
- Bulletin of the Korean Mathematical Society
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- v.46 no.4
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- pp.803-819
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- 2009
In classical encryption schemes, data is encrypted under a single key that is associated with a user or group. In Ciphertext-Policy Attribute-Based Encryption(CP-ABE) keys are associated with attributes of users, given to them by a central trusted authority, and data is encrypted under a logical formula over these attributes. We extend this idea to the case where an arbitrary number of independent parties can be present to maintain attributes and their corresponding secret keys. We present a scheme for multi-authority CP-ABE, propose the first two constructions that fully implement the scheme, and prove their security against chosen plaintext attacks.
https://doi.org/10.4134/BKMS.2009.46.4.803 인용 PDF KSCI

Seo, Hwa-Jeong;Kim, Ho-Won
- Journal of information and communication convergence engineering
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- v.10 no.1
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- pp.53-60
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- 2012
Attribute-based encryption (ABE) is an encryption scheme in which the user is able to decrypt a ciphertext with associated attributes. However, the scheme does not offer the capability of decryption to others when the user is offline. For this reason, the attribute-based proxy re-encryption (ABPRE) scheme was proposed, which combines traditional proxy re-encryption with ABE, so a user is able to empower designated users to decrypt the re-encrypted ciphertext with the associated attributes of designated users. However, previous ABPRE schemes demands a number of pairing operations that imply huge computational overhead. To reduce the number of pairing operations, we reduce the pairing operations with exponent operations. This paper provides a novel approach to an ABPRE scheme with constant pairing operation latency.
https://doi.org/10.6109/jicce.2012.10.1.053 인용 PDF KSCI