Kazuto Ogawa

Arisa Fujii, Go Ohtake, Goichiro Hanaoka, Nuttapong Attrapadung, Hajime Watanabe, Kazuto Ogawa, Hideki Imai: Secure Broadcast System with Simultaneous Individual Messaging. IEICE Transactions 94-A(6): 1328-1337 (2011)

Go Ohtake, Kazuto Ogawa: Application Authentication for Hybrid Services of Broadcasting and Communications Networks. WISA 2011: 171-186

Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa: Efficient Provider Authentication for Bidirectional Broadcasting Service. IEICE Transactions 93-A(6): 1039-1051 (2010)

Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa: Efficient Broadcast Encryption with Personalized Messages. ProvSec 2010: 214-228

Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Takashi Kitagawa, Hajime Watanabe, Kazuto Ogawa, Hideki Imai: An improvement of discrete Tardos fingerprinting codes. Des. Codes Cryptography 52(3): 339-362 (2009)

Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Hideki Imai, Takashi Kitagawa, Kazuto Ogawa, Hajime Watanabe: An Efficient 2-Secure and Short Random Fingerprint Code and Its Security Evaluation. IEICE Transactions 92-A(1): 197-206 (2009)

Go Ohtake, Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai: A Trade-off Traitor Tracing Scheme. IEICE Transactions 92-D(5): 859-875 (2009)

Go Ohtake, Arisa Fujii, Goichiro Hanaoka, Kazuto Ogawa: On the Theoretical Gap between Group Signatures with and without Unlinkability. AFRICACRYPT 2009: 149-166

Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa: An Efficient Strong Key-Insulated Signature Scheme and Its Application. EuroPKI 2008: 150-165

Goichiro Hanaoka, Hideki Imai, Kazuto Ogawa, Hajime Watanabe: Chosen Ciphertext Secure Public Key Encryption with a Simple Structure. IWSEC 2008: 20-33

Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Takashi Kitagawa, Hajime Watanabe, Kazuto Ogawa, Hideki Imai: An improvement of discrete Tardos fingerprinting codes. IACR Cryptology ePrint Archive 2008: 338 (2008)

Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai: Traitor Tracing Scheme Secure against Adaptive Key Exposure and its Application to Anywhere TV Service. IEICE Transactions 90-A(5): 1000-1011 (2007)

Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai: Extension of Broadcasting Service by Using Electronic Tokens. IEICE Transactions 90-D(11): 1741-1750 (2007)

Koji Nuida, Satoshi Fujitsu, Manabu Hagiwara, Takashi Kitagawa, Hajime Watanabe, Kazuto Ogawa, Hideki Imai: An Improvement of Tardos's Collusion-Secure Fingerprinting Codes with Very Short Lengths. AAECC 2007: 80-89

Kazuto Ogawa, Go Ohtake, Goichiro Hanaoka, Hideki Imai: Trade-Off Traitor Tracing. INDOCRYPT 2007: 331-340

Arisa Fujii, Go Ohtake, Goichiro Hanaoka, Kazuto Ogawa: Anonymous Authentication Scheme for Subscription Services. KES (3) 2007: 975-983

Kazuto Ogawa, Goichiro Hanaoka, Kazukuni Kobara, Kanta Matsuura, Hideki Imai: Anonymous Pay-TV System with Secure Revenue Sharing. KES (3) 2007: 984-991

Toshiyuki Fujisawa, Kazuto Ogawa, Takeshi Kimura, Masaki Inamura, Toshiaki Tanaka: Anonymous Prepaid Content Viewing System with Mobile Terminal. SECRYPT 2007: 281-288

Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai: Adaptively Secure Traitor Tracing Against Key Exposure and Its Application to Anywhere TV Service. ACISP 2006: 123-135

Masaki Inamura, Toshiaki Tanaka, Toshiyuki Fujisawa, Kazuto Ogawa, Takeshi Kimura: Flexible License Transfer System Using Mobile Terminal. SECRYPT 2006: 397-404

Kazuto Ogawa, Goichiro Hanaoka, Hideki Imai: A Secure Traitor Tracing Scheme against Key Exposure. CoRR abs/cs/0508011 (2005)

Goichiro Hanaoka, Kazuto Ogawa, Itsuro Murota, Go Ohtake, Keigo Majima, Seiichi Gohshi, Kimiyuki Oyamada, Seiichi Namba, Hideki Imai: Managing Encryption and Key Publication Independently in Digital Rights Management Systems. IEICE Transactions 87-A(1): 160-172 (2004)

Goichiro Hanaoka, Kazuto Ogawa, Itsuro Murota, Go Ohtake, Keigo Majima, Kimiyuki Oyamada, Seiichi Gohshi, Seiichi Namba, Hideki Imai: Separating Encryption and Key Issuance in Digital Rights Management Systems. ACISP 2003: 365-376