This article surveys the literature over the period 2003-2021 on heart-based biometric protocols. In particular, we focus on how the heart signal is transformed from a continuous wave to discrete values to be used afterwards in authentication protocols. We explain and classify the surveyed proposals according to three main parameters: i) the dataset they use for testing their results; ii) the delineation algorithms they use to extract the fiducial points, and; iii) the cryptographic tests they run (if any) to validate how random the extracted token is.

翻译：本文调查2003-2021年期间关于心脏生物鉴别协议的文献。 特别是, 我们关注心脏信号如何从连续波转换为分离值,然后用于认证协议。 我们按照三个主要参数解释和分类被调查的建议:(一) 它们用来测试结果的数据集;(二) 它们用来提取测深点的划界算法;以及(三) 它们(如果有的话)用来验证抽取的标语是多么随机的加密测试。