Today’s global engineering firms have projects across multiple continents and countries, some of them high risk.

Despite this, teams must be on the ground and communicating in support of the projects they must deliver on.

The ability to communicate securely and with 100% privacy amongst staff and local partners is essential. The immediacy and simplicity of instant messaging (IM) is becoming an attractive alternative to email, but the majority of consumer IM apps are far from private, and therefore, unsafe to use.


The solution? A private instant messaging platform originally developed for one of the most security reliant groups on the planet – the military.

Scrambl is private instant messaging with technology originally developed to protect coalition battlefield soldiers. Their lives depended on its security and privacy.

Now global engineering teams can safely instant message each other with the ability to fully authenticate the communications, and safely encrypt all communications data. both in transit and at rest.


Security is provided by a lightweight authentication protocol which creates secure channels between two or more endpoints for transmission of sensitive communication data.

Called Hash Commitment Before Knowledge (HCBK), the protocol has been patented in both European and US markets, and is now available commercially for the first time in Scrambl, a highly secure Instant Messaging communications app for smartphones.

Scrambl allows engineering teams to have a secure means of communicating amongst themselves at a moments notice. Just open the app on any iOS device, enter the email address of the person you’d like to connect with, and Scrambl runs an authentication process to create an encrypted, secure channel between you and the other party.

Scrambl also works with groups – just add more people to the channel as required, for the ability to chat and share image files in a group session.

Channels can be deleted after a project completes, or left intact for ongoing needs.

Download Scrambl


Scrambl VPC diagram

Scrambl creates authenticated private channels between users. These ‘Scrambl channels’ provide end to end encryption of all messages, with keys only ever being stored on the devices – never on a server.

But most importantly is how Scrambl authenticates users on each end of the channel, — thereby ensuring there can be no “man-in-the-middle” compromising its encryption or privacy.

For professionals requiring absolute privacy in their communications, there is no safer way than Scrambl.


Scrambl is the first commercial deployment of the HCBK (Hash Commitment Before Knowledge) protocol, invented by OxCEPT, a team of security experts spun out from the University of Oxford.

Developed to protect MOD soldiers in the coalition battlefield, HCBK provides military-grade authentication over any network, and has been validated and deemed virtually unbreakable by an independent panel of security experts.