CityDefend is a pioneering technology that allows businesses to search directly over encrypted data stored on the cloud. It is a scalable application that integrates across multiple cloud environments and enables businesses to maximise computing efficiency while minimising exposure to technical, regulatory, and reputational risks.
Upload & protect
Search & download
Privacy centric search using encrypted keywords over protected documents
Supports searching over the most common file formats including Word, Excel, and PDF
Scalable across multiple cloud integrations and in several development environments
Easily configurable access rights via a dedicated key management system
Flexible deployment options including web, desktop and mobile applications
Watch our video here …
Enhanced security & privacy
Homomorphic searchable encryption schemes enhance security and give the user full control over their data
Reduced storage overhead
Eliminate the need for maintaining a centralised data structure to reduce storage overhead.
Scalable across cross-cloud and nested cloud infrastructures allowing dynamic databases.
Reduced network latency
Functions with the minimum network traffic and hence reduces the network overhead.
Based on trust atomic primitives that are lightweight and can be used in resource constrained environments.
“Our recent collaboration was focused towards the design and development of single-keyword and multi-keyword Searchable Encryption schemes. We were successfully able to implement and deploy the schemes on BT Alpha Cloud testbed. We are especially thankful to the team at City, University of London for helping us showcase this work at the BT Innovation Week.”
Dr Ali Sajjad
Senior Cloud Security Researcher | British Telecommunications Plc
“We worked with Rajarajan and his team at City, University of London for an Innovate UK project concerning Privacy Preserving Speech Processing in the Cloud. The project had the ambitious aim to develop encrypted processing of speech and Rajarajan and his team’s expertise were instrumental in helping us to plot a course through this new and challenging field. The project was a great success, culminating in a patent for Searchable Encryption applied to Speech Transcripts on the Cloud.”
Dr Cornelius Glackin
Research Scientist | Intelligent Voice Limited
Assuring cloud confidence through Searchable Encryption as a Service
This technology is developed as part of an activity that has received funding from the European Institute of Innovation and Technology (EIT). This body of the European Union receives support from the European Union’s Horizon 2020 research and innovation programme.
Click on the different category headings to find out more. You can also change some of your preferences. Note that blocking some types of cookies may impact your experience on our websites and the services we are able to offer.
Essential Website Cookies
These cookies are strictly necessary to provide you with services available through our website and to use some of its features.
We provide you with a list of stored cookies on your computer in our domain so you can check what we stored. Due to security reasons we are not able to show or modify cookies from other domains. You can check these in your browser security settings.
Other external services
We also use different external services like Google Webfonts, Google Maps, and external Video providers. Since these providers may collect personal data like your IP address we allow you to block them here. Please be aware that this might heavily reduce the functionality and appearance of our site. Changes will take effect once you reload the page.
Google Webfont Settings:
Google Map Settings:
Google reCaptcha Settings:
Vimeo and Youtube video embeds: