https://ogma.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:34860 O(d + m/d), where d is the number of database owners and m is the total number of records in the whole database. In practice, d is small, m can be very large, and so the running time is Om. This means that the protocol is very efficient for large databases. It dramatically reduces the communication costs of computation and completely eliminates the need for exchange of confidential data. We define a new generalized additive homomorphic property and introduce a Multipart ElGamal Cryptosystem (MEC) with split keys, which enjoys this property. MEC is a novel modification of the ElGamal cryptosystem with split keys. This paper presents the results of extensive experiments evaluating the effectiveness of the MSQP protocol employing MEC and comparing it with MSQP employing the ElGamal cryptosystem, for a collection of publicly available medical datasets. The experiments evaluating our protocol on 11 real-life databases and a synthetic database demonstrate that the MSQP protocol employing MEC is more efficient than other options and can be recommended for practical implementations.]]> Wed 14 Jun 2023 13:45:34 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:31624 Sat 24 Mar 2018 08:45:04 AEDT ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:33055 Fri 24 Aug 2018 11:32:46 AEST ]]> https://ogma.newcastle.edu.au/vital/access/ /manager/Repository/uon:37165 Fri 15 Oct 2021 11:00:57 AEDT ]]>