There are a number of techniques that seek to improve our security and privacy on the Internet. Some of them have been adopted by major browsers in their latest versions while others are in operation, and a few of them confirm that they have the highest level of privacy. Among the techniques, some names are known as DNSSEC or TLS 1.3.
As mentioned before, privacy is an issue of increasing importance to many users, so it's a good idea to check if the browser we're using has this aspect. Therefore, it is good to know if it is compatible with the latest technologies that seek to protect the privacy of users and ensure communications.
Browsing Experience Security Check is the free tool provided by Cloudflare to verify that our browser is available and has enabled secure DNS, DNSSEC, TLS 1.3 and SNI encryption support. The test is completed within a few seconds and the tool tells us if we are available in our browser on all four points, as well as an explanation of why it is not available in the browser (if not included).
The techniques analyzed are:
Secure DNS: A technique that encrypts DNS queries, including DNS-over-TLS and DNS-over-HTTPS.
DNSSEC: A technique designed to validate DNS queries.
TLS 1.3: The latest version of the TLS protocol that includes many improvements and closes security breaches.
Encrypted SNI: A shortcut to indicate the name of the encrypted server that detects the host name during a TLS connection. This technology seeks to ensure that only the IP address can be shown.
We already expect that the only browser that supports the four technologies is the Firefox browser, while others support them independently.
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