cryptoPromedium

POPO (Paillier Operation Performance Optimizer)

HackTheBox

An unknown and shady startup is selling its new product, called "POPO" - Paillier Operation Performance Optimizer. Our colleague Bongio claimed to have identified a confidentiality problem, but has now disappeared under mysterious circumstances. Before she disappeared, she published the suspicious c

$ ls tags/ techniques/
modular_arithmeticnonce_reusepaillierhomomorphic_encryptionstate_machine_bugblinding_factoroptimization_flaw
blinding_factor_cancellationstate_manipulationpaillier_decryptionoracle_abuseprivate_key_leak
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