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SECURITY SCORE
Certificate Information
Subject
UNKNOWN={:asn1_OPENTYPE, <<19, 2, 74, 80>>}, UNKNOWN=0100-05-004371, UNKNOWN={:asn1_OPENTYPE, <<19, 20, 80, 114, 105, 118, 97, 116, 101, 32, 79, 114, 103, 97, 110, 105, 122, 97, 116, 105, 111, 110>>}, C=JP, ST=Tokyo, L=Chiyoda-ku, O=Japan Network Information Center, CN=www.nic.ad.jp
Issuer
C=JP, O=Cybertrust Japan Co., Ltd., CN=Cybertrust Japan SureServer EV CA G3
Valid From
September 18, 2025
Valid Until
October 11, 2026
68 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
10:7B:E6:7A:0C:03:FD:FC:F3:B5:21:FD:F7:F4:62:05:F9:C0:0B:D7:91:7A:A8:AC:1D:7A:FD:D3:A8:B3:6E:DA
Alternative Names
Security Configuration
TLS Protocols
TLS 1.2
TLS 1.3
Forward Secrecy
Supported
(Modern clients use PFS)
HTTP Security Headers
Status
Strict-Transport-Security
Present
max-age=15768000
X-Frame-Options
Good
sameorigin
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Missing
Not configured
Permissions-Policy
Present
interest-cohort=()
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • Add Content-Security-Policy header to prevent XSS attacks
- • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
CAA Records (Certificate Authority Authorization)
CAA Records
Configured
(Restricts certificate issuance)
Current Issuer
Not Authorized
(Potential misconfiguration)
Authorized CAs
CAA Issues
- • CRITICAL: Current certificate issuer 'C=JP, O=Cybertrust Japan Co., Ltd., CN=Cybertrust Japan SureServer EV CA G3' is NOT authorized by CAA records. Authorized CAs: cybertrust.ne.jp, globalsign.com
Recommendations
- • Consider using critical flag (flags=128) for stricter CAA enforcement
- • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts
- • Consider adding 'issuewild' records to control wildcard certificate issuance