X.509 certificate metadata observed when communicating with miscellaneous non-HTTPS endpoints, such as IMAPS, POP3S, etc.
Dataset Details
The dataset contains a collection of metadata related to the net new X.509 certificates observed in each study when considering all SSL studies that ran prior. The _hosts and _endpoints files provide mapping between the IPs/endpoints and the fingerprint of the X.509 certificate presented. The _certs file provides a mapping of the net new certificates from a given study and the corresponding fingerprint. The _names file provides a mapping of the X.509 certificate name (CN) to its fingerprint.
Full Dataset Listing
Existing Open Data users can sign in for access. See the About page for information on requesting access.
| File Name | SHA1-Fingerprint | Size | Updated At | |
|---|---|---|---|---|
|
20260328/2026-03-28-1774679822-pop3_starttls_110_names.gz |
7705e2bd6419ba8069d081cfea8d543c31539c07 
|
78.6 MB | March 28, 2026 |
|
|
20260328/2026-03-28-1774679822-pop3_starttls_110_certs.gz |
deb5ce01fe0237a59b0e97397213a305596b0af6
|
3.6 GB | March 28, 2026 |
|
|
20260328/2026-03-28-1774674680-pop3s_995_names.gz |
ac3c73b5d9c10dee8a6f8282cfaded159ac52da5
|
85.6 MB | March 28, 2026 |
|
|
20260328/2026-03-28-1774674680-pop3s_995_certs.gz |
c92c851c4178e6d195f8ca2f46ef1a31903c72fe
|
4.2 GB | March 28, 2026 |
|
|
20260315/2026-03-15-1773572669-pop3_starttls_110_names.gz |
a19b104b3153abec5934457fba5bf13846286587
|
78.8 MB | March 15, 2026 |
|
|
20260315/2026-03-15-1773572669-pop3_starttls_110_certs.gz |
9873ee154582a580acce79bfc6934e6c6c6289c8
|
3.7 GB | March 15, 2026 |
|
|
20260315/2026-03-15-1773549697-imap_starttls_143_names.gz |
6b91fce5c5d566e53a8ef4c747a40b7eab0026e9
|
77.7 MB | March 15, 2026 |
|
|
20260315/2026-03-15-1773549697-imap_starttls_143_certs.gz |
e0cdf59964d0f135419ba4d3b24be8adc59b5f9c
|
3.4 GB | March 15, 2026 |
|
|
20260314/2026-03-14-1773526603-smtp_starttls_587_names.gz |
77505314b6f1fd620e112e8a7cdb7bb9a496fb33
|
51.1 MB | March 15, 2026 |
|
|
20260314/2026-03-14-1773526603-smtp_starttls_587_certs.gz |
4beebf5e6ae3ca1b7a77944d204670316fbc9151
|
2.5 GB | March 15, 2026 |
