Patent attributes
Aspects of the disclosure provide a technological improvement to a cipher by improving data security of format-preserving encryption (FPE), by, inter alia, embedding specific key identifiers for rotating keys directly into ciphertext. Aspects of the disclosure relate to methods, computer-readable media, and apparatuses for improving data security in a format-preserving encryption (FPE) context by using specific methods of rotating and identifying the appropriate encryption key from among numerous rotating keys stored in a key data store. Specific to FPE, a plaintext of the data and its corresponding ciphertext of the data remain the same in length/size; yet the methods, computer-readable media, and/or apparatuses disclosed herein permit embedding of an identification of a specific key among the plurality of rotating keys for the particular ciphertext without compromising the technical requirements of FPE.
