[6] NTP は、インターネットを通じた時刻同期のプロトコルです。
[12] RFC 958 - Network Time Protocol (NTP), , https://tools.ietf.org/html/rfc958
[13] RFC 1059 - Network Time Protocol (version 1) specification and implementation, , https://tools.ietf.org/html/rfc1059
[18] rfc1119.pdf, , https://tools.ietf.org/pdf/rfc1119.pdf
[15] rfc1128.pdf, , https://tools.ietf.org/pdf/rfc1128.pdf
[14] rfc1129.pdf, , https://tools.ietf.org/pdf/rfc1129.pdf
[16] RFC 1165 - Network Time Protocol (NTP) over the OSI Remote Operations Service, , https://tools.ietf.org/html/rfc1165
[17] RFC 1305 - Network Time Protocol (Version 3) Specification, Implementation and Analysis, , https://tools.ietf.org/html/rfc1305
[20] RFC 1361 - Simple Network Time Protocol (SNTP), , https://tools.ietf.org/html/rfc1361
[21] RFC Errata Report » RFC Editor, https://www.rfc-editor.org/errata_search.php?rfc=1361
[19] RFC 1589 - A Kernel Model for Precision Timekeeping, , https://tools.ietf.org/html/rfc1589
[22] RFC 1769 - Simple Network Time Protocol (SNTP), , https://tools.ietf.org/html/rfc1769
[23] RFC 2030 - Simple Network Time Protocol (SNTP) Version 4 for IPv4, IPv6 and OSI, , https://tools.ietf.org/html/rfc2030
[24] RFC Errata Report » RFC Editor, https://www.rfc-editor.org/errata_search.php?rfc=2030
[1] ioerror/tlsdate ( ( 版)) https://github.com/ioerror/tlsdate
[2] NTPプロジェクトの資金難、現在も改善せず | スラド デベロッパー () https://developers.srad.jp/story/16/11/30/0557259/
[3] 「時の翁」が握るNTPの運命 | スラド オープンソース () https://opensource.srad.jp/story/15/03/14/2216237/%E3%80%8C%E6%99%82%E3%81%AE%E7%BF%81%E3%80%8D%E3%81%8C%E6%8F%A1%E3%82%8BNTP%E3%81%AE%E9%81%8B%E5%91%BD
[4] ntp.org: Home of the Network Time Protocol ( (NTP Webmaster, webmaster@ntp.org著, )) http://www.ntp.org/
[8] RFC 8633 - Network Time Protocol Best Current Practices () https://tools.ietf.org/html/rfc8633
[9] NTPサーバの一部が2000年に逆戻りしてしまう事態が発生 - GIGAZINE () https://gigazine.net/news/20121121-computer-clocks-back-to-2000/
[10] さくらインターネット、福岡大学と協力し 世界最速クラスのハードウェア 時刻同期(NTP)サーバーを自社開発 ~FPGAベースの公開NTPサービスをトライアル提供~ | さくらインターネット () https://www.sakura.ad.jp/information/pressreleases/2020/03/17/1968203094/
[11] さくらインターネット | FPGA-NTP サーバ特設実験サイト () https://elab.sakura.ad.jp/ntp-trial/
[25] rfc4075, https://datatracker.ietf.org/doc/html/rfc4075
[27] RFC 4330: Simple Network Time Protocol (SNTP) Version 4 for IPv4, IPv6 and OSI, https://www.rfc-editor.org/rfc/rfc4330.html
[28] RFC Errata Report » RFC Editor, https://www.rfc-editor.org/errata/rfc4330
[29] Authenticated Network Time Synchronization | USENIX, , https://www.usenix.org/conference/usenixsecurity16/technical-sessions/presentation/dowling