This web page documents our dataset of active probing OCSP servers for popular Alexa websites.
OCSP (Online Certificate Status Protocol) is a protocol used to check certificate revocation with HTTP requests.
This dataset is used in paper:
Liang Zhu, Johanna Amann and John Heidemann 2016. Measuring the Latency and Pervasiveness of TLS Certificate Revocation. Passive and Active Measurements Conference (Heraklion, Crete, Greece, Mar. 2016).
The format is a simple text file, one entry per line, with fields separated by tabs.
The first line is a header indicating the columns’ names:
#fsdb -F t name create_request total_delay
The meaning of each column:
- name: website
- create_request: time to generate the OCSP request
- total_delay: the total time between creating the request and receiving the response
## Getting this data
This data is available [upon request](../requests.html).