论文标题
秘密密钥身份验证能力区域,第二部分:典型的身份验证率
Secret key authentication capacity region, Part II: typical authentication rate
论文作者
论文摘要
本文研究了秘密关键认证能力区域。具体而言,重点是源必须通过对手控制的通道传输信息,在该通道中,对手(在源传输之前)决定是否使用其选择的任意选择来替换目的地的观察(希望让目的地接受虚假消息)。为了打击对手,来源和目的地共享一个秘密密钥,他们可以使用该密钥来保证经过认证的通信。然后将这里的秘密密钥身份验证能力区域定义为可共同实现的消息率,认证率和关键消耗率的区域(即需要多少位秘密密钥)。 这是两部分研究中的第二项,研究通过如何测量身份验证率分开。在这里,身份验证率是通过最小接受的最小概率来衡量的,而最小化是在对手处的所有高度可能的观察值子集中。也就是说,将假身份验证的最大概率视为对手观察的函数,而对手的观察为随机变量。然后,将身份验证率测量为最小数字,其最大假身份验证概率大于上述数字的概率很小。这被称为典型的身份验证,因为它只需要考虑传输中典型的对抗性观察。在这种匹配的身份验证量度下,确定了内部和外部边界。
This paper investigates the secret key authentication capacity region. Specifically, the focus is on a model where a source must transmit information over an adversary controlled channel where the adversary, prior to the source's transmission, decides whether or not to replace the destination's observation with an arbitrary one of their choosing (done in hopes of having the destination accept a false message). To combat the adversary, the source and destination share a secret key which they may use to guarantee authenticated communications. The secret key authentication capacity region here is then defined as the region of jointly achievable message rate, authentication rate, and key consumption rate (i.e., how many bits of secret key are needed). This is the second of a two part study, with the studies separated by how the authentication rate is measured. Here, the authentication rate is measured by the minimum of the maximum probability of false acceptance where the minimization is over all highly probable subsets of observations at the adversary. That is, consider the maximum probability of false authentication as a function of the adversary's observation, and the adversary's observation as a random variable. The authentication rate is then measured as the smallest number for which the probability that the maximum probability of false authentication is greater than said number is arbitrary small. This is termed typical authentication, since it only needs to consider adversarial observations which are typical with the transmission. Under this measure of authentication matching inner and outer bounds are determined.