@article{oai:ptu.repo.nii.ac.jp:00000066, author = {大村 , 光德 and 宮崎 , 真一郎 and 松嶋 , 智子 and 山嵜 , 彰一郎 and Omura, Kotoku and Miyazaki, Shinichiro and Matsushima, Tomoko K. and Yamasaki, Shoichiro}, issue = {1}, journal = {技能科学研究}, month = {Jun}, note = {A (k,n) threshold based secret sharing scheme has been used to improve both safety and reliability of highly confi-dential information. When this scheme is applied to preservation of secret key in public key cryptography, there is a risk of the reconstructed secret key being stolen. To overcome such a drawback, a (k,n) threshold based encoding scheme for ElGamal encryption system has been proposed. In this work, we developed a threshold decoding system for ElGamal encryption using NFC (Near Field Communication). The developed system distributes secret keys of ElGamal cryptographic system to NFC devices such as IC cards and Android smartphones using (k,n) threshold scheme. We confirmed that the developed system can decode cryptograms without reconstructing the secret key.}, pages = {18--26}, title = {【論文】NFCを用いたElGamal暗号しきい値復号システムの開発}, volume = {36}, year = {2019}, yomi = {Omura, Kotoku and Miyazaki, Shinichiro and Matsushima, Tomoko K. and Yamasaki, Shoichiro} }