Scientific direction Development of key enabling technologies
Transfer of knowledge to industry

PhD : selection by topics

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Département Systèmes (LETI)

Laboratoire Sécurité des Objets et des Systèmes Physiques




With the emergence of a protocol that secures a history of transactions on a peer-to-peer network, Bitcoin introduced the first decentralized digital currency in 2009. The security of the Bitcoin protocol is based on the proof of work and common rules and procedures among peers in the network who participate in the consensus, i.e. the choice of the next block of data to be added to the shared and replicated ledger. The proof of work has two major drawbacks. On the one hand, it ensures security by design by requiring nodes participating in the consensus to work with a computing intensity corresponding to the maximum of Moore's law, which is obviously very energy consuming. On the other hand, the parallelization of this proof process with an implementation in ASICs makes the system vulnerable to Sybil-type attacks by recentralizing resources. The mining pools exploit this vulnerability. The present thesis topic aims at building a proof for embedded and resource constrained objects, which ensures the security of a transaction history at low power. The work will focus on the embedded implementation of the proof mechanism on a system-on-module platform using a TPM 2.0 (Trusted Platform Module) security hardware component as root-of-trust. The solution introduced will have to be robust to the above-mentioned drawbacks and vulnerabilities.

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