Design and Implementation of a DMARC Verification Result Notification System

Damages caused by spoofed e-mails as sent from a bank, a public organization and so on become serious social problems. In such e-mails attackers forge the sender address to defraud receivers of their personal and/or secret information. As a countermeasure against spoofed e-mails, sender domain authentication methods such as SPF and DKIM are frequently utilized. However, since most spoofed e-mails do not include DKIM signature in their e-mail header, those e-mails cannot be authenticated by the conventional system. Additionally DKIM has a problem that cannot determine whether the attached signature is legitimate. In this paper, we propose a method to detect spoofed e-mails and alert the user without DKIM signature by utilizing DMARC and implement a system that sends DMARC verification results to receivers. By utilizing this system, the users can obtain alerts for spoofed e-mails that the existing systems cannot warn

資料画像公開・利用の国際化と高度化の取り組み : 「日本語史研究資料［国立国語研究所蔵］」の事例

国立国語研究所 研究系 言語変化研究領域東京農工大学 博士前期課程東京電機大学富山大学Language Change Division, Research Department, NINJALGraduate Student, Tokyo University of Agriculture and TechnologyTokyo Denki UniversityUniversity of Toyama昨今，デジタル技術の進歩，学術政策におけるオープンサイエンス・オープンデータの推進と相まって，世界各国の様々な機関が所蔵する資料（主に古典籍）のデジタル画像化とインターネットを通じた公開が進んでいる。従来の公開では，単純な閲覧を目的とした場合，JPEG形式やTIFF形式のデジタル画像を提供する方式や専用ビューアを提供する方式が採用されてきた。また，アノテーションが付与された画像を表示する場合や，複数画像を比較表示するような場合，提供画像と専用ビューアを合わせて用意する方式が採用されてきた。本稿では，従来の公開方式による「日本語史研究資料［国立国語研究所蔵］」に，IIIF規格に準拠した画像公開システムを導入した事例と，コーパス検索結果からの画像参照への実装を報告する。Recently, progress in digital technology and the promotion of open science and open data in academic policies has led to a rapid digitalization of materials (mostly classical texts) from various institutions across the world and their publication on the Internet. Conventionally, digital data made public for the simple purpose of viewing have been presented in the JPEG or TIFF format or a specialized viewer. When displaying images with annotations or comparing several images, both the method of providing both images and the method of the specialized viewer are offered. This article reports on the case of "Collection of the NINJAL Research Library for Study of the Japanese Language History," an implementation of the image publication system based on IIIF specifications and the image references from corpus search results

Sucupiranins A–L, Furanocassane Diterpenoids from the Seeds of <i>Bowdichia virgilioides</i>

Twelve new furanocassane diterpenoids, sucupiranins A–L (<b>1</b>–<b>12</b>), and three known compounds (<b>13</b>–<b>15</b>) were isolated from the seeds of <i>Bowdichia virgilioides</i>. The structures of the compounds were elucidated via ¹H and ¹³C NMR analysis, including 2D NMR (¹H–¹H COSY, HSQC, HMBC, and NOESY); HRMS data; and X-ray crystallographic analysis. The absolute configurations were defined using their electronic circular dichroism (ECD) spectra by applying the exciton chirality method to the bis-<i>p</i>-bromobenzoate of compound <b>13</b>. Sucupiranin J (<b>10</b>) inhibited lipopolysaccharide-induced nitric oxide production (IC₅₀ 30.6 μM), whereas sucupiranins J (<b>10</b>), K (<b>11</b>), and <b>13</b> exhibited weak antimalarial activity against <i>Plasmodium falciparum</i> K1 with IC₅₀ values of 32.2, 23.5, and 22.9 μM and selectivity indices of 4.3, 1.9, and >12.0 (MRC-5/K1), respectively