NIST’s new guidance could make it easier and less expensive for organizations to encrypt and decrypt some forms of data. The guidance specifies two techniques for format-preserving encryption, or FPE. FPE allows a cipher to be the same length as the information being encrypted. The healthcare sector in the U.S. has been struggling with the subject of creating a national patient identifier. The issue is more important than ever, because a standard ID would help match patient records from various sources.”]
Source: https://www.healthcareinfosecurity.com/nists-new-guidance-could-simplify-some-encryption-a-9028