Cybersecurity research · Tokyo

ba-cybersecurity.comResearch by Nobuo Otoi

Talks · IEICE Technical Committee on Internet Architecture (IA), 3 Dec 2026

How Often Do Spam Filters' Hidden-Text Rules Flag Current Benign HTML Email?
A Measurement on 86,372 Sender-Published Newsletter Pages, 2013-2026

迷惑メールフィルタの隠しテキスト規則は、今の正規メールにどれだけ当たるか — Webに公開されたメールマガジン8.6万ページ(2013~2026年)で測る

When · Thu 3 Dec 2026, 11:50–12:15 JSTWhere · Online (Zoom), IA session, Room 1004Form · Technical report (English) and talk

Spam filters carry rules against text hidden in HTML email. This talk measures how often such rules match benign email today, using newsletter pages that senders themselves published on the web between 2013 and 2026. The technical report and the slides will be placed on this page after the talk.

The abstract and keywords registered with IEICE will appear here once they are public on the IEICE programme page. The programme lists the author's affiliation as registered, BA Cybersecurity.

The talk

Meeting
IEICE Technical Committee on Internet Architecture (IA), joint meeting with the Technical Committee on Information Networks (IN), 3–4 Dec 2026, Kwansei Gakuin University Osaka Umeda Campus. IA sessions are also streamed online (Zoom).
Slot
Thursday 3 Dec 2026, 11:50–12:15 JST, session IA2, presentation (7). 20 minutes of talk and 5 of questions.
Presentation
Online. The manuscript is in English; the talk is given in Japanese.
Programme
Entry on the IEICE programme (English) · 日本語

Abstract

Registered abstract — to be added when IEICE publishes it on the programme page.

Materials

These will be placed here on or after 3 Dec 2026.

Slides — after the talk.
Technical report — the IEICE technical report (IEICE Tech. Rep.), after its publication by IEICE, with the IEICE copyright notice and the volume, number and pages.
Data — the reference set used in the talk, after the talk.

Cite as

Nobuo Otoi (ba-cybersecurity.com). How Often Do Spam Filters' Hidden-Text Rules Flag Current Benign HTML Email? A Measurement on 86,372 Sender-Published Newsletter Pages, 2013-2026. 2026. https://ba-cybersecurity.com/research/hidden-text-benign-email/.

@misc{otoi2026hiddentext,
  author       = {Otoi, Nobuo},
  title        = {How Often Do Spam Filters' Hidden-Text Rules Flag Current Benign HTML Email? A Measurement on 86,372 Sender-Published Newsletter Pages, 2013-2026},
  year         = {2026},
  howpublished = {\url{https://ba-cybersecurity.com/research/hidden-text-benign-email/}},
  note         = {Talk at the IEICE Technical Committee on Internet Architecture (IA), 3 Dec 2026. IEICE Technical Report, volume and number to be added}
}

Talk 3 Dec 2026 · Page created 6 Nov 2026 · This page: updated 7 Nov 2026 · Permanent address: https://ba-cybersecurity.com/research/hidden-text-benign-email/