Every security idea, explained three ways.
For people moving into cybersecurity mid-career. Start simple, get precise, then learn why companies pay for it.
Today’s example: DNSSEC
DNSSEC is a wax seal on the internet’s address book. If someone swaps the page, the seal breaks and your computer refuses to go there.
DNSSEC signs DNS records with RRSIG, DNSKEY and DS records, so a validating resolver can prove an answer is authentic and unaltered. It does not encrypt anything.
It stops customers being silently sent to a fake login page. Companies rarely buy it alone: it comes inside managed DNS and DDI platforms run by the network team.
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Why I’m writing this
I’ve spent seven years in digital advertising, at Meta, GroupM and Sportradar. Now I’m learning security from scratch, and the fastest way I’ve found to understand a protocol is to explain it to a ten-year-old, then draw it.
Every lesson here is one of those explanations, checked against official sources, with the commercial view added for anyone coming from sales, marketing or account management.