1. A computer-implemented method for tokenizing data, comprising: tokenizing, by a tokenization engine of a tokenization system, first data using one or more initialization vectors from a set of initialization vectors to form first tokenized data; accessing, by an input module of the tokenization system, one or more updated initialization vectors from a vector replacement table; in response to a bandwidth available to the tokenization system being below a threshold bandwidth, replacing, by an update engine of the tokenization system, fewer than all of the set of initialization vectors with the accessed updated initialization vectors to form an updated set of initialization vectors; and tokenizing, by the tokenization engine of the tokenization system, second data using one or more initialization vectors from the updated set of initialization vectors to form second tokenized data.