"The International Association of Cryptologic Research (IACR) said Friday that the votes were submitted and tallied using Helios, an open source voting system that uses peer-reviewed cryptography to cast and count votes in a verifiable, confidential, and privacy-preserving way. Helios encrypts each vote in a way that assures each ballot is secret. Other cryptography used by Helios allows each voter to confirm their ballot was counted fairly."
"To prevent two of them from colluding to cook the results, each trustee holds a third of the cryptographic key material needed to decrypt results. "Unfortunately, one of the three trustees has irretrievably lost their private key, an honest but unfortunate human mistake, and therefore cannot compute their decryption share," the IACR said. "As a result, Helios is unable to complete the decryption process, and it is technically impossible for us to obtain or verify the final outcome of this election.""
Encrypted ballots were submitted and tallied using Helios, which provides verifiable, confidential, privacy-preserving voting by encrypting each vote and enabling voters to confirm fair counting. IACR’s election used a three-way trustee key split so no two trustees could collude to decrypt results. One trustee irretrievably lost their private key and could not provide a decryption share, making final decryption technically impossible and forcing cancellation of the election results. IACR will change key management to require only two trustees’ shares. The trustee who lost the key resigned and was replaced, and a new election has been started.
Read at Ars Technica
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