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  4. SILBE: An Updatable Public Key Encryption Scheme from Lollipop Attacks
 
conference paper

SILBE: An Updatable Public Key Encryption Scheme from Lollipop Attacks

Duparc, Max Jackson Samuel Sydney William Leslie  
•
Fouotsa, Tako Boris  
•
Vaudenay, Serge  
Eichlseder, Maria
•
Gambs, Sébastien
March 13, 2025
International Conference on Selected Areas in Cryptography – SAC 2024
Selected Areas in Cryptography - sac 2024

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 the first isogeny-based UPKE which is not based on group actions. In its core, SILBE extensively uses both the Deuring Correspondence and Kani’s Lemma, two central concepts in Isogeny-Based Cryptography.

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2024-400-2.pdf

Type

Main Document

Version

http://purl.org/coar/version/c_71e4c1898caa6e32

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openaccess

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541.79 KB

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Adobe PDF

Checksum (MD5)

c247b1a8993d00dda9d4cc4f9a86063b

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