Abstract: A computer-implemented solution is provided to allow electronic locks to implement commands more complex than simply opening or closing, such as timeframe-dependent commands, without requiring an access to the Internet at the time of access. At a remote computer, such as a cloud server, computer-readable instructions initially provided in a sequence of plain text characters, are encrypted into a user code using format preserving encryption (FPE) (e.g. FF3-1). The user code is communicated to the user. The user can then input the user code into the electronic lock via a numerical keypad or other suitable means. The lock is provided with computer functionalities which include a functionality to decrypt the cipher text of the user code back into plain text programming instructions using a decryption key, and execute it. The execution can involve determining whether one or more authorization condition is/are satisfied.

Abstract: A computer-implemented solution is provided to allow electronic locks to implement commands more complex than simply opening or closing, such as timeframe-dependent commands, without requiring an access to the Internet at the time of access. At a remote computer, such as a cloud server, computer-readable instructions initially provided in a sequence of plain text characters, are encrypted into a user code using format preserving encryption (FPE) (e.g. FF3-1). The user code is communicated to the user. The user can then input the user code into the electronic lock via a numerical keypad or other suitable means. The lock is provided with computer functionalities which include a functionality to decrypt the cipher text of the user code back into plain text programming instructions using a decryption key, and execute it. The execution can involve determining whether one or more authorization condition is/are satisfied.