Certificate authority · Snapshot 23 October 2026
Sites on TAIWAN-CA
223 measured sites rely on TAIWAN-CA as their certificate authority. How common it is by popularity band, how its customers configure related checks, and the continuity steps worth taking.
- Sites
- 223
- Median readiness index
- 50/100
- Profiles
- 20
<1% of all measured sites
all sites: 64
top-50K sites
Share by popularity band
| Chrome UX Report band | Share of measured sites | Sites |
|---|---|---|
| Top 1K | 0% | 0 |
| Top 5K | <1% | 1 |
| Top 10K | <1% | 1 |
| Top 50K | <1% | 20 |
| Top 100K | <1% | 26 |
| Top 500K | <1% | 80 |
| Top 1M | <1% | 95 |
Related checks among TAIWAN-CA customers
| Check | Lane | Observed | All sites | Measured |
|---|---|---|---|---|
| Certificate lifetime of 100 days or less | Harden | <1% | 75% | 223 |
| Certificate has more than 14 days left | Harden | 99% | >99% | 223 |
| CAA records limit who can issue certificates | Harden | 9% | 11% | 223 |
| TLS 1.3 negotiated | Harden | 59% | 92% | 223 |
| HSTS kept for at least a year | Harden | 66% | 31% | 204 |
Continuity steps for TAIWAN-CA customers
- Automate renewal with ACME. Public TLS certificates are limited to 200 days from 15 March 2026, 100 days from 15 March 2027 and 47 days from 15 March 2029.
- If you publish CAA records, include a second certificate authority you could switch to, so one issuer's problem cannot block renewal.
- Keep a list of where each certificate is installed (CDN, load balancer, origin) and how each one renews.