rmhrisk

import pandas as pd
import requests
from cryptography import x509
from cryptography.hazmat.backends import default_backend
from cryptography.hazmat.primitives import hashes
from io import StringIO
from datetime import datetime, timezone
import time
import matplotlib.pyplot as plt

rmhrisk

import pandas as pd
import requests
from cryptography import x509
from cryptography.hazmat.backends import default_backend
from io import StringIO
from cryptography.hazmat.primitives import hashes
import matplotlib.pyplot as plt

def download_csv(url):
    response = requests.get(url)

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Rank	Certificate Authority	Unexpired Precertificates	Percentage	Cumulative %
1	Internet Security Research Group	338,978,164	47.928%	47.928%
2	DigiCert	81,481,742	11.521%	59.449%
3	Sectigo	71,963,799	10.175%	69.624%
4	GoDaddy	69,771,281	9.865%	79.489%
5	Amazon Trust Services	56,893,730	8.044%	87.533%
6	Google Trust Services LLC	56,021,094	7.921%	95.454%
7	Microsoft Corporation	23,484,401	3.320%	98.774%
8	IdenTrust Services, LLC	4,385,571	0.620%	99.394%

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WebPKI CA Revenue

• This is intended to be an appendix of sorts for WebPKI and Digital Signature related M&A + Investment + Public Offerings
• I have been in and around this space for a long time, I know some things that are not public just like you probably do, as such I have, and will continue to excluded these sorts of details.

Company	Year	Amount
BuyPass	2015	They reported revenue of 192 million Norweigan Krones in 2015; using today's exchange rate, this is about $23 million US dollars.
Quovadis	2016	WISeKey reported QuoVadis (whom they acquired) had revenue of $18

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Edge

Safari

Chrome

Firefox

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Ryans-MBP:room_react_skylink rmh$ ping google.com
PING google.com (216.58.193.78): 56 data bytes
64 bytes from 216.58.193.78: icmp_seq=0 ttl=55 time=6.156 ms
64 bytes from 216.58.193.78: icmp_seq=1 ttl=55 time=5.830 ms
64 bytes from 216.58.193.78: icmp_seq=2 ttl=55 time=7.903 ms
64 bytes from 216.58.193.78: icmp_seq=3 ttl=55 time=7.963 ms
64 bytes from 216.58.193.78: icmp_seq=4 ttl=55 time=6.510 ms
64 bytes from 216.58.193.78: icmp_seq=5 ttl=55 time=4.856 ms
64 bytes from 216.58.193.78: icmp_seq=6 ttl=55 time=6.755 ms

rmhrisk

PDF was initially released over 23 years ago, it solved a very important problem. How could you provide an electronic equivalent to paper?

As a standard, like most things evolved over decades, it’s actually pretty awful. The specification reads like it was designed by an army of people who seldom spoke and had no long term plan.

That said, it is without a doubt still one of the most important file formats on the web. Its issues are a direct result of the era it was designed in, open standards were far from the norm, the desktop was king, and the internet was primarily used for email.

A lot has changed since then, but PDF itself, though it has had more features added to its specification, has not materially changed much. Some of the larger issues with the format include:

• They are often bloated large documents making them slow to download and render,
• The layout is generally fixed and not responsive making them awkward to read on a mobile device,

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OSX

sqlite3 ~/Library/Keychains/*/ocspcache.sqlite3 'DELETE FROM ocsp;'

Windows

certutil -URLcache * delete

Linux

dirmngr --flush

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WebCrypto is relativley new but it is already used in some very popular services, some of which include:

	Description
openpgpjs	Uses WebCrypto to protect email.
1Password Teams	1Password for Teams uses WebCrypto to make sharing passwords easy.

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If you are going to be using Web Crypto in your application you better also get the basics of Web Security in your application taken care of. This is a list of resources that are useful when looking at the security of a web application.

TLS

Transport Layer Security (TLS) and its predecessor, Secure Sockets Layer (SSL), both frequently referred to as "SSL", are cryptographic protocols that provide communications security over a computer network.

Resources

• SSL Labs
• Mozilla TLS Observatory
• Mozilla SSL Configuration Generator
• Let's Encrypt