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SECOM Trust Systems certificates on popular websites

SECOM Trust Systems issued 10 of the 8,208 certificates we observed on popular sites in November 2026.

0.1%of observed certificates10 of 8,208

198 daysmedian validity period

20.0%expiring within 30 daysat scan time

90.0%validated for the host name

Validity period

Days between notBefore and notAfter of the leaf certificate.

up to 100 days 0.0%

101 to 200 days 60.0%

201 to 398 days 40.0%

over 398 days 0.0%

TLS versions negotiated

On sites using SECOM Trust Systems (accent) and all sites (grey).

TLSv1.3 60.0%

all sites 84.9%

TLSv1.2 40.0%

all sites 15.1%

About SECOM Trust Systems

Issuer organisation names seen in these certificates: SECOM Trust Systems Co., Ltd. (6), SECOM Trust Systems CO.,LTD. (4).

0.0% of the domains using SECOM Trust Systems publish a CAA record (all sites: 20.7%). A CAA record names the CAs allowed to issue for the domain; any other CA must refuse.

CA site: https://www.secomtrust.net/

Popular sites with a SECOM Trust Systems certificate

site777.jpmhlw.go.jpu-tokyo.ac.jpmlit.go.jpl-tike.comkyoto-u.ac.jpnii.ac.jpsecomtrust.netunitedcinemas.jpd-deltanet.com

Check one yourself:

Check SSL certificate Look up CAA records HTTP headers

Source: our own scan of November 2026 (2026-11-11), 9,971 of the top 10,000 domains of the Tranco list Y895G that answered in DNS. Method and data.