5. A system, comprising: a token mapping datastore storing token mapping data that associates a plurality of strings with corresponding tokens, the token mapping datastore included in a first computing environment associated with a first trust level; a whitelist token mapping datastore storing whitelist token mapping data that associates a subset of the plurality of strings with the corresponding tokens, the whitelist token mapping datastore included in a second computing environment associated with a second trust level; a first computing device in communication with the token mapping datastore, the first computing device configured to execute a first set of computer-readable instructions that cause the first computing device to: generate tokenized information that includes one or more tokens that correspond to one or more strings of the plurality of strings; send the tokenized information to be stored in the second computing environment; and a second computing device in communication with the first computing device and the whitelist token mapping datastore, the second computing device configured to execute a second set of computer-readable instructions that cause the second computing device to: receive a search request including one or more search terms; for the one or more search terms that are included in the whitelist token mapping data, retrieve the corresponding token from the whitelist token mapping datastore; for the one or more search terms that are not included in the whitelist token mapping data, send a request that the first computing device retrieve the corresponding token from the token mapping datastore; based at least in part on one or more tokens corresponding to the one or more search terms, perform a search for the tokenized information stored in the second computing environment; identify one or more tokens in the tokenized information that are included in the whitelist token mapping data; replace the identified one or more tokens with one or more corresponding strings from the whitelist token mapping data, to generate partly detokenized information; and provide the partly detokenized information in response to the search request.
5. A system, comprising: a token mapping datastore storing token mapping data that associates a plurality of strings with corresponding tokens, the token mapping datastore included in a first computing environment associated with a first trust level; a whitelist token mapping datastore storing whitelist token mapping data that associates a subset of the plurality of strings with the corresponding tokens, the whitelist token mapping datastore included in a second computing environment associated with a second trust level; a first computing device in communication with the token mapping datastore, the first computing device configured to execute a first set of computer-readable instructions that cause the first computing device to: generate tokenized information that includes one or more tokens that correspond to one or more strings of the plurality of strings; send the tokenized information to be stored in the second computing environment; and a second computing device in communication with the first computing device and the whitelist token mapping datastore, the second computing device configured to execute a second set of computer-readable instructions that cause the second computing device to: receive a search request including one or more search terms; for the one or more search terms that are included in the whitelist token mapping data, retrieve the corresponding token from the whitelist token mapping datastore; for the one or more search terms that are not included in the whitelist token mapping data, send a request that the first computing device retrieve the corresponding token from the token mapping datastore; based at least in part on one or more tokens corresponding to the one or more search terms, perform a search for the tokenized information stored in the second computing environment; identify one or more tokens in the tokenized information that are included in the whitelist token mapping data; replace the identified one or more tokens with one or more corresponding strings from the whitelist token mapping data, to generate partly detokenized information; and provide the partly detokenized information in response to the search request. 11. The system of claim 5 , the first computing device further configured to: receive, from the second computing device, the request that the first computing device retrieve the corresponding token from the token mapping datastore; determine a frequency of a plurality of requests that include the request; and deny the request, based on the frequency exceeding a predetermined threshold frequency.