@inproceedings {Ifip15, title = {A4Cloud Workshop: Accountability in the Cloud}, booktitle = {IFIP Sumer School 2015 on Privacy and Identity Management. Time for a Revolution?}, volume = {476}, year = {2016}, month = {07/2016}, pages = {61-78}, publisher = {AICT Series, Springer}, organization = {AICT Series, Springer}, address = {Edinburgh (United Kingdon)}, author = {Carmen Fernandez-Gago and Siani Pearson and Michela D{\textquoteright}Errico and Rehab Alnemr and Tobias Pulls and Anderson Santana de Oliveira} } @inproceedings {agudo2016technique, title = {A Technique for Enhanced Provision of Appropriate Access to Evidence across Service Provision Chains}, booktitle = {10th International IFIP Summer School on Privacy and Identity Management}, year = {2016}, pages = {187-204}, abstract = {

Transparency and verifiability are necessary aspects of accountability, but care needs to be taken that auditing is done in a privacy friendly way. There are situations where it would be useful for certain actors to be able to make restricted views within service provision chains on accountability evidence, including logs, available to other actors with specific governance roles. For example, a data subject or a Data Protection Authority (DPA) might want to authorize an accountability agent to act on their behalf, and be given access to certain logs in a way that does not compromise the privacy of other actors or the security of involved data processors. In this paper two cryptographic-based techniques that may address this issue are proposed and assessed.

}, isbn = {978-3-319-41762-2}, doi = {10.1007/978-3-319-41763-9_13}, author = {Isaac Agudo and Ali El Kaafarani and David Nu{\~n}ez and Siani Pearson} } @inproceedings {1516, title = {Tools for Cloud Accountability: A4Cloud Tutorial}, booktitle = {9th IFIP Summer School on Privacy and Identity Management for the Future Internet in the Age of Globalisation}, volume = {457}, year = {2015}, pages = {219-236}, publisher = {Springer IFIP AICT}, organization = {Springer IFIP AICT}, address = {Patras (Greece)}, abstract = {

Cloud computing is becoming a key IT infrastructure technology being adopted progressively by companies and users. Still, there are issues and uncertainties surrounding its adoption, such as security and how users data is dealt with that require attention from developers, researchers, providers and users. The A4Cloud project tries to help solving the problem of accountability in the cloud by providing tools that support the process of achieving accountability. This paper presents the contents of the first A4Cloud tutorial. These contents include basic concepts and tools developed within the project. In particular, we will review how metrics can aid the accountability process and some of the tools that the A4Cloud project will produce such as the Data Track Tool (DTT) and the Cloud Offering Advisory Tool (COAT).

}, isbn = {978-3-319-18620-7}, issn = {978-3-319-18621-4}, doi = {10.1007/978-3-319-18621-4_15}, author = {Carmen Fernandez-Gago and Vasilis Tountopoulos and Simone Fischer-H{\"u}bner and Rehab Alnemr and David Nu{\~n}ez and Julio Angulo and Tobias Pulls and Theo Koulouris} } @inproceedings {nunez2013metamodel, title = {A Metamodel for Measuring Accountability Attributes in the Cloud}, booktitle = {2013 IEEE International Conference on Cloud Computing Technology and Science (CloudCom 2013)}, year = {2013}, month = {12/2013}, pages = {355-362}, publisher = {IEEE}, organization = {IEEE}, address = {Bristol, UK}, abstract = {

Cloud governance, and in particular data governance in the cloud, relies on different technical and organizational practices and procedures, such as policy enforcement, risk management, incident management and remediation. The concept of accountability encompasses such practices, and is essential for enhancing security and trustworthiness in the cloud. Besides this, proper measurement of cloud services, both at a technical and governance level, is a distinctive aspect of the cloud computing model. Hence, a natural problem that arises is how to measure the impact on accountability of the procedures held in practice by organizations that participate in the cloud ecosystem. In this paper, we describe a metamodel for addressing the problem of measuring accountability properties for cloud computing, as discussed and defined by the Cloud Accountability Project (A4Cloud). The goal of this metamodel is to act as a language for describing: (i) accountability properties in terms of actions between entities, and (ii) metrics for measuring the fulfillment of such properties. It also allows the recursive decomposition of properties and metrics, from a high-level and abstract world to a tangible and measurable one. Finally, we illustrate our proposal of the metamodel by modelling the transparency property, and define some metrics for it.

}, isbn = {978-0-7685-5095-4}, doi = {10.1109/CloudCom.2013.53}, author = {David Nu{\~n}ez and Carmen Fernandez-Gago and Siani Pearson and Massimo Felici} } @inproceedings {neumann2012strong, title = {Strong Authentication of Humans and Machines in Policy Controlled Cloud Computing Environment Using Automatic Cyber Identity}, booktitle = {Information Security Solutions Europe 2012}, year = {2012}, month = {2012}, pages = {195-206}, publisher = {Springer Vieweg}, organization = {Springer Vieweg}, address = {Brussels, Belgium}, abstract = {

The paper describes the experience with integration of automatic cyber identity technology with policy controlled virtualisation environment. One identity technology has been used to enable strong authentication of users (human beings) as well as machines (host systems) to the virtualization management system. The real experimental evaluation has been done in PASSIVE project (Policy-Assessed system-level Security of Sensitive Information processing in Virtualised Environments - SEVENTH FRAMEWORK PROGRAMME THEME ICT-2009.1.4 INFORMATION AND COMMUNICATION TECHNOLOGIES - Small or medium-scale focused research project - Grant agreement no.: 257644).

}, isbn = {978-3-658-00332-6}, doi = {10.1007/978-3-658-00333-3_19}, author = {Neumann Libor and Tomas Halman and Rotek Pavel and Alexander Boettcher and Julian Stecklina and Michal Sojka and David Nu{\~n}ez and Isaac Agudo}, editor = {Norbert Pohlmann and Helmut Reimer and Wolfgang Schneider} } @inproceedings {agudo2011cryptography, title = {Cryptography Goes to the Cloud}, booktitle = {1st International Workshop on Security and Trust for Applications in Virtualised Environments (STAVE 2011)}, series = {Communications in Computer and Information Science}, volume = {187}, year = {2011}, month = {June}, pages = {190-197}, publisher = {Springer}, organization = {Springer}, abstract = {

In this paper we identify some areas where cryptography can help a rapid adoption of cloud computing. Although secure storage has already captured the attention of many cloud providers, offering a higher level of protection for their customer{\textquoteright}s data, we think that more advanced techniques such as searchable encryption and secure outsourced computation will become popular in the near future, opening the doors of the Cloud to customers with higher security requirements.

}, isbn = {978-3-642-22364-8}, doi = {10.1007/978-3-642-22365-5_23}, author = {Isaac Agudo and David Nu{\~n}ez and Gabriele Giammatteo and Panagiotis Rizomiliotis and Costas Lambrinoudakis}, editor = {Changhoon Lee and Jean-Marc Seigneur and James J. Park and Roland R. Wagner} }