Himitsu project the beginning: initial architecture and multiparty support
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Keywords
PET ; Privacy ; Himitsu project ; Instant messaging ; Group key agreements ; End-to-end encryption ; Service advertizement ; Group instant messaging ; New systemAbstract
Nowdays the landscape of Internet has drastically changed, as a result various problems happened towards user’s
privacy and freedom of speech. Many offered solutions as seen in [1] lack of the necessary user experience in order for a
widespread solution, easy for the average Joe to adopt. As a result I propose the Himitsu project, a long-term project
aiming to offer privacy through the end-to-end encryption and the use of user-published services with awesome user
experience, via extending the technologies of Instant Messaging.
Initially there will be a bibliographic research regarding the technologies used for Group Key Agreement, the
algorithms with focus on ones that used in Instant messaging protocols. There will be analyzed the hard problems
and methodologies used for proving their security and on how they works as well. Furthermore we also study the
logical overlay communication structure used for message exchanging and based on that we classify the key agreement
protocol.
Afterwards a further bibliographic research is performed on existing Instant Messaging protocols focusing on how
the privacy is protected, specifically is studied what privacy requirements needs to be met on a multiparty instant
messaging system. Also is focused on what cryptographic primitives are used to fulfill the privacy requirements and
how effectively are being used.
Next, attempts are described on implementing a group key agreement. There were 2 attempts one Implementing
the mDP algorithm using electron and XMPP and one implementing Burmester Desmedt using C and MPI. At the
end the Himitsu’s initial architecture, requirements and technologies used are being described.
Having studied all the protocols mentioned above, I achieved to make the initial architecture for the Himitsu Project
and define its initial technical and security requirements, based upon existing technologies and architectures used for
instant messaging, even though I failed to implement a group key agreement. Also I managed to define a development
roadmap and I figured out what necessary steps are required in order to develop the required components (either
protocol-based ones or the software-based ones) of it.
Postgraduate Studies Programme
Ασφάλεια Ψηφιακών ΣυστημάτωνDepartment
Σχολή Τεχνολογιών Πληροφορικής και Επικοινωνιών. Τμήμα Ψηφιακών ΣυστημάτωνNumber of pages
43Language
EnglishCollections
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Αναφορά Δημιουργού - Μη Εμπορική Χρήση - Παρόμοια Διανομή 4.0 Διεθνές
Αναφορά Δημιουργού - Μη Εμπορική Χρήση - Παρόμοια Διανομή 4.0 Διεθνές