Entrance auf der COMPSAC 2016 / UCDAS 2016

Auf der diesjährigen 40th IEEE Computer Society International Conference on Computers, Software & Applications (COMPSAC 2016) ist das Projekt Entrance mit einer wissenschaftlichen Ausarbeitung mit dem Titel “”Please, no more GUIs!”: A user study, prototype development and evaluation on the integration of Attribute-based Encryption in a hospital environment” im Workshop 3rd International Workshop on User Centered Design and Adaptive Systems (UCDAS2016) vertreten.


Bethencourt’s CP-ABE runs in a pNaCl application

Progress has been made on our Browser-based client.
Bethencourt’s CP-ABE implementation “cpabe” has been successfully “ported” to our portable Native Client (pNaCl) browser extension. With the help of previously ported PBC library, the ciphertext decryption runs well – provided that a appropriate secret ABE key was applied.
Next, adaptations are made in order to support further ABE schemes, such as this scheme.

WebAssembly: einheitlicher Bytecode für das Web

WebAssembly macht Fortschritte. Ein erster experimenteller Support von WebAssembly ist jetzt in der V8 JavaScript Engine (ab Version 5.1.117) verfügbar. 🙂

Weitere Links:

  • Artikel: “A WebAssembly Milestone: Experimental Support in Multiple Browsers” (By Luke Wagner): [Link]
  • WebAssembly Community Group @ W3C [Link]
  • WebAssembly’s GitHub Repo: [Link]

Entrance auf der IEEE iThings 2015

Die wissenschaftliche Ausarbeitung mit dem Titel “Applying Attribute-based Encryption on Publish Subscribe Messaging Patterns for the Internet of Things” wurde auf der 8. Internationalen IEEE Konferenz “Internet of Things” (iThings 2015) in Sydney, Australien vorgestellt.

New Master and Bachelor thesis topics in the field of “Attribute-based Encryption”

We offer challenging tasks for motivated students. We focus on Attribute-based Encryption (public-key cryptography flavor), searchable encryption, web technologies in the context of Online Social Networks, Cloud Computing and P2P related scenarios. Herby, we combine data-centric and user-centric security concepts to enable a secure and seamless data sharing experience.

Some thesis (Master/Bachelor) topics are briefly described below:

1st. topic (Bachelor thesis):
Extend our already existing portable Native Client (pNaCl) (Browser plugin) to support Attribute-based Encryption. More precise, focus on the decryption function, which is more or less the same as described by Bethencourt et al. in CP-ABE. Implementation here.
We already ported the Pairing-based crypto library (PBC library) to pNaCl.
Required skills: interest in cryptography, web technologies, programming skills in C/C++, JavaScript, HTML

2nd. topic (Master thesis):
Extent our system (based on Liu’s ABE scheme) to support the notion of Searchable Encryption. Implement a trapdoor function and the appropriate Search function. Some [related work]. A use case would be: enable to search for specific encrypted pictures in a picture gallery based on picture tags, e.g. “vacation” or names, such as “paul”.
Required skills: interest in cryptography, programming skills in Java (server), C/C++ (client)

Get in contact with dt-mail

Webassembly: an alternative to JavaScript

Webassembly (wasm) is a new and fast binary format for webcontent. It is supported by all big browser vendors, such as Microsoft, Mozilla, Google and WebKit. Developers can write C- and C++ extensions for browsers, which will be transformed by a LLVM-backend to wasm.

Further information:
Documentations: https://github.com/WebAssembly

PersoApp und Sony’s Xperia Z3 compact

Der PersoApp eID Client für Android in der Rev146 ist u.a. kombatibel zum Sony Xperia Z3 compact (Modell D5803) (Android 4.4.4; Build 23.0.1.A.5.77) .

Vorkompilierte PersoApp APKs  können hier geladen: PersoApp-Rev146. (~6MB)

Ein “NXP TagInfo” Screenshots des Z3 anbei: