Multi-party privacy aggregation-oriented discrete Gaussian noise security sampling method and system

The invention discloses a discrete Gaussian noise secure sampling method and system for multi-party privacy aggregation. The method comprises the following steps: each participant provides a uniform bit stream; performing secure sampling on the uniform bit stream to obtain a secure uniform bit stream; sampling and converting the geometric noise based on the safe uniform bit stream to obtain discrete Laplacian noise; and performing denial sampling on the discrete Laplacian noise based on the secure uniform bit stream to obtain discrete Gaussian noise. The method and the system can ensure malicious security. 本发明公开了一种面向多方隐私聚合的离散高斯噪声安全采样方法和系统，包括以下步骤：各参与方提供均匀比特流；对均匀比特流进行安全采样以得到安全均匀比特流；基于安全均匀比特流对几何噪声进行采样并转换以得到离散拉普拉斯噪声；基于安全均匀比特流对离散拉普拉斯噪声进行拒绝采样以得到离散高斯噪声。该方法和系统可以保证恶意安全性。