Abstract: A vehicle system includes a vehicle network and a core electronic control unit communicatively coupled to the vehicle network. The core electronic control unit is programmed to generate an initial hash based on a first event on the vehicle network, the initial hash designated as a current hash; and recursively generate a next hash based on a time associated with a next event on the vehicle network and based on the current hash. The next event occurs after the first event. The next hash is designated as the current hash for a next recursion of generating the next hash.

Abstract: An example method of compressing a data set includes determining whether individual values from a data set correspond to a first category or a second category of values. Based on one of the values corresponding to the first category, the value is added to a compressed data set. Based on one of the values corresponding to the second category, the value is excluded from the compressed data set, and a statistical distribution of values of the second category is updated based on the value. During a first phase, the determining is performed for a plurality of values from a first portion of the data set based on comparison of the values to criteria. During a second phase, the determining is performed for a plurality of values from a second portion of the data set based on the statistical distribution.

Abstract: An example method of compressing a data set includes determining whether individual values from a data set correspond to a first category or a second category of values. Based on one of the values corresponding to the first category, the value is added to a compressed data set. Based on one of the values corresponding to the second category, the value is excluded from the compressed data set, and a statistical distribution of values of the second category is updated based on the value. During a first phase, the determining is performed for a plurality of values from a first portion of the data set based on comparison of the values to criteria. During a second phase, the determining is performed for a plurality of values from a second portion of the data set based on the statistical distribution.