Everything you need to know about using the portal
Open this portal in Safari only. Other browsers won't work for iOS installations.
Go to ESign Portal and tap any ESign variant (e.g., ESign - Chiba)
When iOS prompts you, tap "Install" to begin the installation
Go to Settings → General → VPN & Device Management
Tap the certificate name and tap "Trust"
App appears on home screen and should work immediately!
Install our iOS profiles to prevent certificate revocation
Go to iOS Profiles page and download the OCSP profile
Highly recommended for cleaner browsing experience
Certificates with longest validity