"Kyohei Sudo,Masayuki Tezuka,Keisuke Hara,Yusuke Yoshida,Keisuke Tanaka","Watermarkable Signature with Computational Function Preserving",,"IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences",,"  E104.","  9","pp. 1255-1270",2021,Sept.
"Keisuke Hara,Keisuke Tanaka","Tightly secure ring signatures in the standard model",,"Theoretical Computer Science",,"Volume 892",,"Page 208-237",2021,Sept.
"Yi Lu,Keisuke Hara,Keisuke Tanaka","Receiver Selective Opening CCA Secure Public Key Encryption from Various Assumptions",,"IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences",,"  E104","  9","pp. 1206-1218",2021,Sept.
"Keisuke Hara,Takahiro Matsuda,Keisuke Tanaka","Receiver Selective Opening Chosen Ciphertext Secure Identity-Based Encryption","the 8th ACM on ASIA Public-Key Cryptography Workshop","Proceedings of the 8th ACM on ASIA Public-Key Cryptography Workshop",,,,"pp. 51-59",2021,May
"Daiki Hiraga,Keisuke Hara,Masayuki Tezuka,Yusuke Yoshida,Keisuke Tanaka","Security Definitions on Time-Lock Puzzles","International Conference on Information Security and Cryptology","Information Security and Cryptology ? ICISC 2020",,,,"pp. 3-15",2021,Feb.
"KEISUKE TANAKA,Keisuke Hara","Ring Signature With Unconditional Anonymity in the Plain Model",,"IEEE Access",,"Vol. 9",,"pp. 7762-7774",2021,Jan.
"数藤 恭平,手塚 真徹,原 啓祐,吉田 雄祐,田中 圭介","計算量的機能保存性をもつ電子透かし署名",,,,,,,2021,Jan.
"山室宏貴,原啓祐,手塚真徹,吉田雄祐,田中圭介","フォワード安全な認証付きコミッティング暗号","情報とセキュリティシンポジウム(SCIS2021)",,,,,,2021,Jan.