olemus
tundliku andmeelemendi asendamine tundetu tingnimega, mis esindab seda elementi, kuid mille kaudu ei saa seda elementi tuvastada

Wiktionary, tokenize, verb:
2. (transitive, computing) to substitute sensitive data with meaningless placeholders

ülevaateid
https://en.wikipedia.org/wiki/Tokenization_(data_security)
https://www.tokenex.com/resource-center/what-is-tokenization