Phishiest Certificate Authorities

This table show the top 10 phishiest certificate authorities, based on the number of currently blocked phishing sites with an associated valid, trusted SSL certificate where the CA has had a chance to review the deceptive domain name or host name. For example, we do not include a block of borclays.netcraft.com as the associated certificate is valid for *.netcraft.com.

Find out more about Netcraft's Services for Certificate Authorities, including Phishing Alerts for CAs, Deceptive Domain Scoring, and Pre-Issuance certificate checking.

Certificate Authority Phishing Certificates Currently Blocked
Let's Encrypt 4837
Sectigo 3199
DigiCert 1829
GoDaddy 93
Asseco 23
Comodo 13
Actalis 10
GlobalSign 9
Sectigo Limited 6
Amazon 5

Note: Authorities are ranked by the number of certificates blocked.

This graphs shows the number of phishing SSL certificates used by blocked phishing sites on each day over the last year, broken down by CA. Certificates only count for the days in which their associated phishing site is included in the Netcraft Phishing Site Feed, and the certificate has neither expired nor been revoked.