Med-e-Tel 2011, The International eHealth, Telemedicine and Health ICT Forum Luxembourg, 6 - 8 April 2011

Biljana Cubaleska, Hans Löhr, Ahmad-Reza Sadeghi, Marcel Winandy

Ruhr-University Bochum

MediTrust Secure Client Systems for Healthcare IT

to Protect Sensitive Data of Patients

Ammar Alkassar, Christian Stüble Sirrix AG security technologies

Simple E-Health Cloud

Advanced E-Health Cloud

Security Problem Areas

•  Data Storage and Processing -  Data centers: unauthorized information leakage

-  Platform security: vulnerable to malware

-  Mobile storage (USB memory sticks)

•  Infrastructure Management -  Cryptographic keys, certificates

-  Hardware / software components

•  Usability and User Experience -  Smartcard PIN (when unconscious?)

-  Time consuming

Platform Security (Server)

unauthorized access (read/modify)

Platform Security (Client)

unauthorized access (read/modify)

authorized download

MediTrust: Project Goals •  Secure end-user platform

-  Protect medical data from unauthorized access/manipulation -  Secure separation of data of different workflows

•  Security infrastructure management -  Secure domains should span over several hardware nodes

-  Central and easy management entity

•  Usable security solution -  Transparent security protection

-  No overhead in the normal workflow

Building Privacy Domains

Technology

•  Security infrastructure: Trusted Virtual Domains -  TVD: coalition of trusted execution environments -  Transparent policy enforcement -  Secure communication

•  Client platform security: TURAYA.TrustedDesktop -  Security Kernel -  Implements TVD security model on local platforms -  Isolated compartments (virtualization) -  Uses Trusted Computing functionality (TPM)

TVD Architecture

Hardware  

Turaya  Security  Kernel  

Security  Module  

VM  TVD  

Proxy  B  

TVD  B  

VM  

TVD  Proxy  A  

TVD  A  

TVD  Master  A  

Hardware  

Cred

Policy

TURAYA.TrustedDesktop

Main Security Features: •  Full hard-disk encryption •  Secure networking •  Transparent file encryption •  Secure graphical user interface

Secure Networking

Transparent File Encryption

Transparent File Encryption

Transparent File Encryption

Transparent File Encryption

!  

Conclusion & Outlook

•  Security infrastructure to protect sensitive data

•  Based on TVDs and TURAYA.TrustedDesktop

•  Field study (late 2011) -  20 users (health professionals) -  Analysis of effectiveness and usability

•  More information online:

MediTrust http://www.rubtrust-meditrust.de

Marcel Winandy marcel.winandy@trust.rub.de