What the transition costs, and what it gives back
The textbook route to post-quantum is a decade of construction. An overlay is software, and it replaces enough of what you already pay for each month to show up in this year's budget, well before any deadline.
The upgrade is
the hard part
The textbook fix is QKD: dedicated fibre, trusted relay nodes every hundred kilometres, new hardware at every hop.
Dedicated fibre, trusted relay nodes, new hardware at every hop.
Civil works and certification, against deadlines starting in 2030.
No answer for radio, satellite, serial links, or anything that moves.
And that assumes
every weak point gets found
A typical estate encrypts in a dozen places, each with its own keys and certificates. Every one of them has to be found, funded, upgraded and re-certified.
Each red square is its own budget line and vendor conversation.
The impact starts now, not in 2030
Most organisations call us about the transition, but it isn't the only reason to move now. The same overlay cuts costs you're already paying every month.
Illustrative only. A device-by-device programme runs one project after another, while an overlay is installed once.
Find out what this costs to run
The assessment shows what can be upgraded, what can't, and what each route costs to run. The report is yours either way.