SILBE: an Updatable Public Key Encryption Scheme from Lollipop Attacks

ePrint Report: SILBE: an Updatable Public Key Encryption Scheme from Lollipop Attacks

Max Duparc, Tako Boris Fouotsa, Serge Vaudenay

We present a new post-quantum Public Key Encryption scheme (PKE) named Supersingular Isogeny Lollipop Based Encryption or SILBE. SILBE is obtained by leveraging the generalized lollipop attack of Castryck and Vercauteren on the M-SIDH Key exchange by Fouotsa, Moriya and Petit. Doing so, we can in fact make of SILBE a post-quantum secure Updatable Public Key Encryption scheme (UPKE). SILBE is …

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