Technologies and methods for security access

1. An electronic lock, comprising:

a dynamic display device;

an input device; and

one or more processors that are configured to:

execute a time-based cryptographic algorithm to compute a time-based access code;

cause the dynamic display device to display a machine-readable optical identifier that encodes at least a lock identifier of the electronic lock, along with at least one of:

a time received from a clock at the electronic lock,

a battery level of a battery at the electronic lock,

a log entry of a log at the electronic lock,

a log entry count of the log at the electronic lock, or

a hash of the log at the electronic lock;

based at least on displaying the machine-readable optical identifier at the dynamic display device, receive an access code at the input device;

compare the time-based access code with the received access code; and

grant access to one or more lock features when the time-based access code matches the received access code.

2. The electronic lock as recited in claim 1 , wherein the machine-readable optical identifier encodes the time received from the clock at the electronic lock.

3. The electronic lock as recited in claim 1 , wherein the machine-readable optical identifier encodes the battery level of the battery at the electronic lock.

4. The electronic lock as recited in claim 1 , wherein the machine-readable optical identifier encodes the log entry of the log at the electronic lock.

5. The electronic lock as recited in claim 1 , wherein the machine-readable optical identifier encodes the log entry count of the log at the electronic lock.

6. The electronic lock as recited in claim 1 , wherein the machine-readable optical identifier encodes the hash of the log at the electronic lock.

7. The electronic lock as recited in claim 1 , wherein the one or more processors are also configured to pair with a mobile device using one or more radios.

8. The electronic lock as recited in claim 1 , wherein the input device comprises one or more radios.

9. The electronic lock as recited in claim 1 , wherein the input device comprises a keypad.

10. The electronic lock as recited in claim 1 , wherein the one or more processors are also configured to grant access to the one or more lock features only during periods of time defined by one or more rules.

11. The electronic lock as recited in claim 1 , wherein the input device comprises one or more photosensitive sensors.

12. The electronic lock as recited in claim 1 , wherein the time-based access code is valid between a defined start time and end time.

13. The electronic lock as recited in claim 1 , wherein the one or more processors are also configured to verify authenticity of the received access code.

14. The electronic lock as recited in claim 13 , wherein verifying authenticity of the received access code comprises decrypting or decoding the access code with a shared key.

15. The electronic lock as recited in claim 13 , wherein verifying authenticity of the received access code comprises verifying a checksum of the received access code.

16. An electronic lock, comprising:

at least one radio configured for Bluetooth communications; and

one or more processors that are configured to:

execute a time-based cryptographic algorithm to compute a time-based access code;

communicate a device identifier configured to initiate Bluetooth pairing to an external computing device visually using a machine-readable optical identifier at a dynamic display device, or wirelessly using at least one radio configured for Near-Field Communications (NFC);

based at least on communicating the device identifier to the external computing device, establish a Bluetooth connection between the electronic lock and the external computing device using the one or more radios;

receive an access code from the external computing device;

compare the time-based access code with the received access code; and

grant access to one or more lock features when the time-based access code matches the received access code.

17. The electronic lock of claim 16 , wherein the one or more processors communicate the device identifier to the external computing device visually using the machine-readable optical identifier at the dynamic display device.

18. The electronic lock of claim 16 , wherein the one or more processors communicate the device identifier to the external computing device using NFC.

19. The electronic lock of claim 16 , wherein the one or more processors are also configured to receive the access code from the external computing device using the at least one radio configured for Bluetooth communications.

20. An electronic lock, comprising:

a dynamic display device;

one or more radios configured at least for Bluetooth communications; and

one or more processors that are configured to:

execute a time-based cryptographic algorithm to compute a time-based access code;

communicate a device identifier configured to initiate Bluetooth pairing to an external computing device using the dynamic display device;

based at least on communicating the device identifier to the external computing device using the dynamic display device, establish a Bluetooth connection between the electronic lock and the external computing device using the one or more radios;

receive an access code from the external computing device using the Bluetooth connection;

compare the time-based access code with the received access code; and

grant access to one or more lock features when the time-based access code matches the received access code.