Certificate Breakdown by Type
Domain96%Organization4%
Validation Level
ECDSA20%RSA80%
Public Key Algorithm
ECDSA SHA-2565%ECDSA SHA-38410%RSA SHA-25683%RSA SHA-3842%
Signature Algorithm
 
CT-Qualified Cert28%Cert15%Precert57%
Entry Type
Current15%Expired85%
Expired vs. Current
 
Issuing Certificate Authorities
Global Details

Precert Issuance Rate: 390,856 certs/hr
Precert Expiry Rate: 352,931 certs/hr

Legacy Algorithms

The tables below count the number of currently-valid certificates signed by widely trusted CAs that use insecure or deprecated algorithms.

Signature Algorithm #
SHA1-RSA178
Public-Key Algorithm #
(None)
Issuance per Day by Certificate Authority

This section shows the number of pre-certificates issued in the previous 30 days (based on the NotBefore field) per certificate authority, deduplicated across CT logs. Only pre-certificates are shown to avoid overrepresenting CAs that log both pre-certificates and their corresponding final certificates.

0M2M4M6M8M10MDateAuthority Name
Log Utilization by Large Certificate Authorities

This section shows the number of non-expired pre-certificates in known CT logs from a few particularly large certificate authorities. Anyone can submit a pre-certificate they find in one log to another log, but this currently shows that some CAs have a clear preference for certain CT logs when they issue a certificate containing embedded SCTs, while others submit to several logs equally.

Amazon Trust Services
DigiCert
GlobalSign nv-sa
GoDaddy
Google Trust Services LLC
IdenTrust Services, LLC
Internet Security Research Group
Sectigo
  • Google Argon2024
    901,417,150 pre-certs
  • Google Argon2025h1
    174,619,250 pre-certs
  • Google Argon2025h2
    148,768,731 pre-certs
  • Google Xenon2024
    975,233,802 pre-certs
  • Google Xenon2025h1
    143,030,122 pre-certs
  • DigiCert Nessie2025
    56,441,002 pre-certs
  • DigiCert Yeti2024
    1,120,815,995 pre-certs
  • DigiCert Yeti2025
    350,396,198 pre-certs
  • Let's Encrypt Oak2024H2
    467,390,491 pre-certs
  • Let's Encrypt Sycamore2025h1b
    704,105,542 pre-certs
  • Let's Encrypt Willow2025h1b
    704,616,552 pre-certs
  • Sectigo Sabre
    18,108,458 pre-certs
  • Cloudflare Nimbus2024
    352,691,840 pre-certs
  • Cloudflare Nimbus2025
    145,565,259 pre-certs
  • TrustAsia Log2024-2
    4,374,646 pre-certs