• 95 Citations
  • 4 h-Index
1990 …2018
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Research Output 1990 2018

  • 95 Citations
  • 4 h-Index
  • 46 Article
  • 24 Conference contribution
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Conference contribution
2015
1 Citation (Scopus)

Design and implementation of client IP notification feature on DNS for proactive firewall system

Otsuka, T., Gada, Yamai, N., Okayama, K. & Jin, Y., Sep 21 2015, Proceedings - International Computer Software and Applications Conference. IEEE Computer Society, Vol. 3. p. 127-132 6 p. 7273340

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Servers
Communication
Masks
Internet
2014
4 Citations (Scopus)

Performance improvement of SCTP communication using selective bicasting on lossy multihoming environment

Okamoto, K., Yamai, N., Okayama, K., Kawano, K., Nakamura, M. & Yokohira, T., Sep 15 2014, Proceedings - International Computer Software and Applications Conference. IEEE Computer Society, p. 551-557 7 p. 6899260

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wireless networks
Communication
Packet loss
Packet networks
Local area networks
2013
2 Citations (Scopus)

An optimal route selection mechanism for outbound connection on IPv6 site multihoming environment

Yamaguchi, T., Jin, Y., Yamai, N., Okayama, K., Okamoto, K. & Nakamura, M., 2013, Proceedings - International Computer Software and Applications Conference. p. 575-580 6 p. 6605853

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Routers
Middleware
Internet service providers
Internet
Experiments
3 Citations (Scopus)

Domain registration date retrieval system of URLs in E-Mail messages for improving spam discrimination

Matsuoka, M., Yamai, N., Okayama, K., Kawano, K., Nakamura, M. & Minda, M., 2013, Proceedings - International Computer Software and Applications Conference. p. 587-592 6 p. 6605855

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Electronic mail
Websites

E-mail priority delivery system with dynamic whitelist in the layer 3 switch

Gada, Yamai, N., Okayama, K., Kawano, K. & Nakamura, M., 2013, Proceedings - International Computer Software and Applications Conference. p. 581-586 6 p. 6605854

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Electronic mail
Switches
Degradation
2012

A location free network system applicable to geographical terms of the electronic journal site license

Ohsumi, Y., Okayama, K., Yamai, N., Fujiwara, T. & Hieda, T., 2012, Proceedings - 2012 IEEE/IPSJ 12th International Symposium on Applications and the Internet, SAINT 2012. p. 357-362 6 p. 6305311

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Industry

Multihoming method using routing header in IPv6 environment

Yamaguchi, T., Jin, Y., Tokumoto, R., Yamai, N., Okayama, K. & Nakamura, M., 2012, Proceedings - 2012 IEEE/IPSJ 12th International Symposium on Applications and the Internet, SAINT 2012. p. 351-356 6 p. 6305310

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Routers
Internet
Servers
Interfaces (computer)
Costs
1 Citation (Scopus)

Spam mail discrimination system based on behavior of DNS servers associated with URLs

Suwa, S., Yamai, N., Okayama, K., Nakamura, M., Kawano, K. & Gada, 2012, Proceedings - 2012 IEEE/IPSJ 12th International Symposium on Applications and the Internet, SAINT 2012. p. 381-386 6 p. 6305315

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Websites
Servers
Fluxes
Botnet
2011
3 Citations (Scopus)

An identification method of PCs behind NAT router with proxy authentication on HTTP communication

Ishikawa, Y., Yamai, N., Okayama, K. & Nakamura, M., 2011, Proceedings - 11th IEEE/IPSJ International Symposium on Applications and the Internet, SAINT 2011. p. 445-450 6 p. 6004120

Research output: Chapter in Book/Report/Conference proceedingConference contribution

HTTP
Routers
Authentication
Communication
Access control
2 Citations (Scopus)

DNS resource record analysis of URLs in e-mail messages for improving spam filtering

Suwa, S., Yamai, N., Okayama, K. & Nakamura, M., 2011, Proceedings - 11th IEEE/IPSJ International Symposium on Applications and the Internet, SAINT 2011. p. 439-444 6 p. 6004119

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Websites
Fluxes
Botnet
2010

A dynamic routing method for inbound e-mail delivery considering route and MTA conditions on multihomed environment

Jitsuto, S., Jin, Y., Okayama, K. & Yamai, N., 2010, Proceedings - 2010 10th Annual International Symposium on Applications and the Internet, SAINT 2010. p. 245-248 4 p. 5598133

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Dynamic loads
Resource allocation
3 Citations (Scopus)

A MAC-address relaying NAT router for PC identification from outside of a LAN

Murakami, R., Yamai, N. & Okayama, K., 2010, Proceedings - 2010 10th Annual International Symposium on Applications and the Internet, SAINT 2010. p. 237-240 4 p. 5598135

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Routers
Local area networks
Access control
Servers
1 Citation (Scopus)

An adaptive route selection mechanism per connection based on multipath DNS round trip time on multihomed networks

Jin, Y., Yamai, N., Okayama, K. & Nakamura, M., 2010, Proceedings - 2010 10th Annual International Symposium on Applications and the Internet, SAINT 2010. p. 52-58 7 p. 5598175

Research output: Chapter in Book/Report/Conference proceedingConference contribution

World Wide Web
Internet
3 Citations (Scopus)

A solution for mail forwarding problem of SPF by tracing recipient addresses

Seike, T., Jin, Y., Yamai, N., Okayama, K., Kawano, K. & Nakamura, M., 2010, Proceedings - 2010 10th Annual International Symposium on Applications and the Internet, SAINT 2010. p. 129-132 4 p. 5598160

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Authentication
Experiments
2007
2 Citations (Scopus)

An efficient management method of access policies for hierarchical virtual private networks

Okayama, K., Yamai, N., Ishibashi, H., Abe, K. & Matsuura, T., 2007, Proceedings of the 2007 2nd International Conference on Communication System Software and Middleware and Workshops, COMSWARE 2007. 4268017

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Virtual private networks
Servers
Internet
Authentication
Cryptography
2006
3 Citations (Scopus)

Priority control in receiving E-mails by giving a separate response to each DNS query

Maruyama, S., Yamai, N., Nakamura, M., Okayama, K., Okabe, Y. & Miyashita, T., 2006, Proceedings - 2006 International Symposium on Applications and the Internet, SAINT 2006. Vol. 2006. p. 90-93 4 p. 1581317

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Electronic mail
Servers
3 Citations (Scopus)

Throughput optimization in TCP with a performance enhancing proxy

Osada, S., Wang, H., Yokohira, T., Fukushima, Y., Okayama, K. & Yamai, N., 2006, International Conference on Communication Technology Proceedings, ICCT. 4146499

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Throughput
Routers
2005

A framework for mobile agent systems with the capability of preceding and following users

Yokohira, T., Okayama, K., Murakami, T. & Takarako, K., 2005, 6th Asia-Pacific Symposium on Information and Telecommunication Technologies, APSITT 2005 - Proceedings. Vol. 2005. p. 89-94 6 p. 1593443

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Mobile agents
Application programming interfaces (API)
Recovery
1 Citation (Scopus)

A method of dynamic interconnection of VLANs for large scale VLAN environment

Okayama, K., Yamai, N., Miyashita, T., Kawano, K. & Okamoto, T., 2005, 6th Asia-Pacific Symposium on Information and Telecommunication Technologies, APSITT 2005 - Proceedings. Vol. 2005. p. 427-432 6 p. 1593504

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Local area networks
Authentication
Managers
Servers
Switches
6 Citations (Scopus)

A protection method against massive error mails caused by sender spoofed spam mails

Yamai, N., Okayama, K., Miyashita, T., Maruyama, S. & Nakamura, M., 2005, Proceedings - 2005 Symposium on Applications and the Internet, SAINT'2005. p. 384-390 7 p. 1386138

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Servers
4 Citations (Scopus)

Performance improvement of TCP using performance enhancing proxies - Effect of premature ACK transmission timing on throughput

Osada, S., Yokohira, T., Hui, W., Okayama, K. & Yamai, N., 2005, 6th Asia-Pacific Symposium on Information and Telecommunication Technologies, APSITT 2005 - Proceedings. Vol. 2005. p. 7-12 6 p. 1593429

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Throughput
Beer
Routers
2003
4 Citations (Scopus)

A two-stage hierarchical algorithm for wavelength assignment in WDM-based Bidirectional Manhattan Street Networks

Kitani, T., Yonedu, M., Funabiki, N., Nakanishi, T., Okayama, K. & Higashino, T., 2003, IEEE International Conference on Networks, ICON. IEEE Computer Society, p. 419-424 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Wavelength division multiplexing
Wavelength
Broadband networks
Heuristic algorithms
Simulated annealing
2001
12 Citations (Scopus)

A dynamic traffic sharing with minimal administration on multihomed networks

Yamai, N., Okayama, K., Shimamoto, H. & Okamoto, T., 2001, IEEE International Conference on Communications. Vol. 5. p. 1506-1510 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Costs
1990
21 Citations (Scopus)

Design and implementation of an authentication system in WIDE internet environment

Yamaguchi, S., Okayama, K. & Miyahara, H., 1990, 90 IEEE Reg 10 Conf Comput Commun Syst IEEE TENCON 90. Publ by IEEE, p. 653-657 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Authentication
Internet
UNIX
Cryptography
Network protocols