Gaurav Sharma

Author's posts

Apr 24

Seminar: Rajeev Anand Sahu “Designated Verifier Blind Signature from Supersingular Isogeny” (Apr 25, 2018)

Apr 25, 2018 – 12.30 – room P.2NO8.08

Speaker: Rajeev Anand Sahu (ULB)

Title: “Designated Verifier Blind Signature from Supersingular Isogeny”
Short abstract: “Isogeny-based cryptography has recently attracted researchers as a candidate post-quantum cryptography. The first digital signature on this platform was presented by Jao and Soukharev in 2014, which is an Undeniable Signature. Currently, Srinath and Chandrasekaran have constructed Undeniable Blind Signature to provide signer’s control on the verification. Their structure involves communication overhead and the basic issues of undeniable signature. In this work, we attempt to propose a scheme of Isogeny-Based Blind Signature with requester’s control over the verification, by the means of Designated Verifier Signature.”

Apr 12

Seminar: Bojan Spasic “Searchable Symmetric Encryption” (Apr 18, 2018)

Apr 18, 2018 – 12.30 – room P.2NO8.08

Speaker: Bojan Spasic (ULB)

Title: “Searchable Symmetric Encryption”
Short abstract: “Searchable Symmetric Encryption (SSE) has received a lot of research attention recently. To date, SSE schemes seem to provide the best tradeoffs between efficiency and security among different encrypted search solutions (e.g. property-preserving encryption, fully-homomorphic encryption, ORAM, functional encryption). Informally, SSE schemes encrypt a search structure which is outsourced to an untrusted server (e.g. in the cloud) together with the corresponding encrypted data collection. SSE enables clients to privately query the search structure in order to retrieve matching documents from the data collection. SSE has been studied in different security models and tradeoffs between security, efficiency and query expressiveness have been explored.”

Mar 12

Seminar: François Gerard “BLISS: Bimodal Lattice Signature Scheme” (Mar 14, 2018)

Mar 14, 2018 – 12.30 – room P.2NO8.08

Speaker: François Gerard (ULB)

Title: “BLISS: Bimodal Lattice Signature Scheme”
Short abstract: “In 2009, Lyubashevsky proposed the first provably secure lattice-based signature using the Fiat-Shamir paradigm. It’s security depends on a rejection step during the signature procedure. For this rejection sampling technique to be efficient, one must use a large distribution for the nonce resulting in large signatures. A few years later, Ducas and al. proposed a new scheme called BLISS optimizing this crucial step of rejection to decrease the overall size of the signature.”

Mar 06

Seminar: Helena Bruyninckx “Quantum Authentication (&Quantum Encryption)” (Mar 07, 2018)

Mar 07, 2018 – 12.30 – room P.A2.220

Speaker: Helena Bruyninckx (ULB)

Title: “Quantum Authentication (&Quantum Encryption)”

Feb 21

Seminar: Dimitrios Sisiaridis “Security Analytics: Reducing Data Complexity with Apache Spark – aggregating features and data transformation” (Feb 07, 2018)

Feb 07, 2018 – 12.30 – room P.A2.220

Speaker: Dimitrios Sisiaridis (ULB)

Title: “Security Analytics: Reducing Data Complexity with Apache Spark – aggregating features and data transformation”