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additive-homomorphism

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systemslibrarian / crypto-lab-paillier-gate

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Browser-based Paillier cryptosystem demo — Pascal Paillier's 1999 additive homomorphic encryption. Encrypt, decrypt, homomorphic addition without decrypting. Private 10-voter election simulation and 5-hospital patient aggregation. The primitive underlying GG20 threshold ECDSA, Helios voting, and ElectionGuard. No backends. No simulated math.

cryptography paillier homomorphic-encryption e-voting public-key-cryptography secure-computation threshold-ecdsa crypto-lab private-aggregation additive-homomorphism helios-voting
  • Updated Apr 19, 2026
  • TypeScript

systemslibrarian / crypto-lab-silent-tally

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Browser-based demo of secure multi-party computation — five hospitals compute combined enrollment without revealing individual counts. Shamir SSS · additive homomorphism · GF(2⁶¹-1) · no trusted third party.

cryptography mpc shamir-secret-sharing lagrange-interpolation crypto-lab secure-multiparty-computation finite-field information-theoretic-security additive-homomorphism
  • Updated Apr 11, 2026
  • TypeScript

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