December 9, 2021
SALT LAKE CITY--Venafi®, the inventor and leading provider of machine identity management solutions, today announced the findings of a new crawler report from security researcher and encryption expert, Scott Helme. The report, which is sponsored by Venafi, provides an in-depth security analysis of the world’s top 1 million sites over the last 18 months. Driven by the acceleration of digital transformation and cloud migration during the pandemic, the analysis shows that in many ways, the internet is becoming more secure. Use of encryption is increasing and the adoption of newer TLS protocols is rising. However, despite the adoption of stronger encryption protocols, many companies continue to use legacy RSA encryption algorithms to generate keys, which in conjunction with TLS certificates, act as machine identities that authorize secure connections between physical, virtual and IoT devices, APIs, applications and clusters. RSA algorithms are significantly less secure than modern alternatives.
Key findings include:
Of the three categories of key generation algorithms commonly used for asymmetric encryption – RSA, DSA and ECDSA – ECDSA is the most secure due to the computational complexity. ECDSA generates significantly smaller authorization keys, which require less bandwidth to set up an SSL/TLS connection. These smaller keys are ideal for mobile applications, and since they can be stored in devices with much more limiting memory constraints, ECDSA keys are ideal to support mTLS stacks in IoT and embedded devices.
“I was hoping that the uptake in TLSv1.3 would push people to use ECDSA keys for authentication instead of RSA because they are much more secure, but sadly, that hasn't happened,” said Helme. “It seems that RSA is still the preferred key algorithm by quite a considerable margin. Organizations say they keep RSA around for legacy clients that don't yet support ECDSA, but the huge rise in TLSv1.3 use is at odds with that notion because it isn't supported by legacy clients either.”
“We also continue to see use of RSA 3072 and RSA 4096 algorithms in numbers that are concerning. This suggests that more work is needed to inform site operators about the security and performance advantages of the newer ECDSA key algorithm,” added Helme.
The research also shows that Let’s Encrypt now leads the CA market for TLS—a particularly notable achievement, given that in 2016 Let’s Encrypt was completely absent from the top 1 million. Twenty-eight percent of sites scanned use Let's Encrypt, with Let’s Encrypt and Cloudflare accounting over half of the top 1 million TLS certificates in use. The rise of Let’s Encrypt has been mirrored by a sharp decline in the use of extended validation (EV) certificates. The number of top 1 million sites using EV certificates is at its lowest point ever in the last six years of analysis.
“The rise of Let’s Encrypt marks a sharp drop in the perceived value of EV certificates,” said Kevin Bocek, vice president, security strategy and threat intelligence at Venafi. “Browsers no longer give EV certificates any special treatment, and the speed of development today simply does not accommodate the slow, manual approval processes connected with them. Cloud-native technologies require much larger numbers of TLS certificates, and these technologies absolutely require automation for machine identities. Given that EV certificates are not automation friendly, their usage and value is going to continue to drop.”
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