The term "Encryption by date" is not widely recognized in established cryptographic literature, academic research, or industry standards. No reliable, verifiable sources describe a formal cryptographic method or system specifically known as "encryption by date." As such, accurate information is not confirmed.
The phrase may be interpreted contextually to refer to time-based encryption mechanisms, such as systems where encryption keys are derived from or associated with specific dates or timestamps. For example, it could hypothetically describe a scenario where a date functions as a seed for a key generation algorithm, or where access to encrypted data is restricted to a particular date or time window. However, such applications are not standardized under this name.
Related but distinct concepts include time-locked encryption, time-based one-time passwords (TOTP), and key expiration policies. These technologies involve time as a functional component but are not referred to in the literature as "encryption by date."
Due to the lack of authoritative references, the term remains undefined within formal cryptographic discourse.