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SECURITY SCORE
Detected Technologies
Certificate Information
Subject
CN=electricitymaps.com
Issuer
C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA
Valid From
March 22, 2026
Valid Until
June 20, 2026
39 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
6B:04:08:5A:4D:00:F6:02:A1:9C:54:D2:B4:76:D8:5E:8E:7D:A7:DC:BC:BB:B8:6A:3D:86:69:5F:FA:27:61:48
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=31536000
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • Add Content-Security-Policy header to prevent XSS attacks
- • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
- • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
- • Consider adding Permissions-Policy to control browser features
CAA Records (Certificate Authority Authorization)
CAA Records
Configured
(Restricts certificate issuance)
Current Issuer
Not Authorized
(Potential misconfiguration)
Authorized CAs
comodoca.com
digicert.com
; cansignhttpexchanges=yes
letsencrypt.org
pki.goog
; cansignhttpexchanges=yes
ssl.com
Wildcard CAs
comodoca.com
digicert.com
; cansignhttpexchanges=yes
letsencrypt.org
pki.goog
; cansignhttpexchanges=yes
ssl.com
CAA Issues
- • CRITICAL: Current certificate issuer 'C=AT, O=ZeroSSL, CN=ZeroSSL ECC Domain Secure Site CA' is NOT authorized by CAA records. Authorized CAs: comodoca.com, digicert.com; cansignhttpexchanges=yes, letsencrypt.org, pki.goog; cansignhttpexchanges=yes, ssl.com
Recommendations
- • Consider using critical flag (flags=128) for stricter CAA enforcement
- • You have authorized 5 CAs - consider limiting to only the CAs you actively use
- • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts