Field communications
Sensitiveintelligence isbroadcast inthe field.
Sensitive information moves between teams over radio links.
A hostileterminal capturesthe signal.
The encryptionis broken,exposing intelligence.
Captured messages become readable through stolen keys, implementation flaws, or quantum attacks on vulnerable key exchange. 3
Secure the link.
SPEKTRUM.
Quantum-secure
communications.
An interception
is attempted.
Intercepted.
Still encrypted.
Rerouted.
Still encrypted.
SPEKTRUM.
Spektrum
Making critical communications quantum secure.
Much of today’s digital security rests on mathematical problems that conventional computers cannot feasibly solve. A sufficiently powerful quantum computer could break widely used public-key cryptography. Encrypted traffic collected today could then be read years later.3
AI is also becoming a tool for finding mathematical weaknesses in cryptography. In July 2026, AI-assisted research found a weakness in HAWK, a proposed post-quantum digital signature scheme.4 NIST’s approved post-quantum standards were unaffected.5
Encryption in the field and in critical infrastructure.
In the field, encrypted data travels between terminals over free-space optical links, connecting teams without laying cable.
For critical infrastructure, quantum key distribution (QKD) establishes shared encryption keys over optical fibre. These keys are used to encrypt communications between buildings and sites.
QKD over fibre
London’s financial
infrastructure.
Royal Mint Court sits between the City and Canary Wharf. Public planning documents record BT, Colt and Verizon infrastructure around the site.