Secure delivery via unmanned vehicles

1. An unmanned vehicle for on-demand delivery, comprising:

a navigation system for guiding the vehicle to a delivery location;

a chamber configured to house a payload and adjust a payload state, the payload state being adjusted based on detection of a tampering event, wherein adjusting the payload state comprises marking the payload; and

an authentication system configured to conditionally allow access to the payload upon arrival of the vehicle at the delivery location.

2. The unmanned vehicle of claim 1 , wherein the tampering event comprises:

an altitude measurement that departs from an expected altitude by a predetermined amount associated with a travel route.

3. The unmanned vehicle of claim 1 , wherein the tampering event comprises:

a movement measurement that departs from an expected measurement by a predetermined amount associated with a travel route.

4. The unmanned vehicle of claim 1 , wherein the tampering event comprises:

a communication loss between the unmanned vehicle and a control center.

5. The unmanned vehicle of claim 1 , wherein the tampering event comprises:

a number of failed authentication events that meets or exceeds a predetermined threshold.

6. The unmanned vehicle of claim 1 , wherein the tampering event comprises:

a power loss of the unmanned vehicle.

7. The unmanned vehicle of claim 1 , wherein the tampering event comprises:

damage to the unmanned vehicle.

8. The unmanned vehicle of claim 1 , wherein adjusting the payload state comprises:

destroying the payload.

9. The unmanned vehicle of claim 1 , wherein adjusting the payload state comprises:

voiding the payload.

10. A method for on-demand delivery, comprising:

housing a payload in a chamber of an unmanned vehicle configured to adjust a payload state;

providing access to the payload based on a positive determination by an authentication system;

adjusting a payload state based on a negative determination by the authentication system; and

marking the payload based on detection of a tampering event.

11. The method of claim 10 , comprising:

adjusting the payload state based on a determination that the unmanned vehicle experienced an unexpected loss of altitude.

12. The method claim 10 , further comprising:

adjusting the payload state based on a determination that the unmanned vehicle experienced a movement that meets or exceeds a predetermined threshold.

13. The method of claim 10 , further comprising:

adjusting the payload state based on a determination that the unmanned vehicle experienced a communication loss between the unmanned vehicle and a control center.

14. The method of claim 10 , further comprising:

adjusting the payload state based on a determination that the unmanned vehicle experienced a number of failed authentication events that meets or exceeds a predetermined threshold.

15. The method claim 10 , further comprising:

adjusting the payload state based on a determination that the unmanned vehicle experienced a power loss.

16. The method of claim 10 , further comprising:

adjusting the payload state based on a determination that the unmanned vehicle experienced a part failure or a system failure.

17. The method of claim 10 , further comprising:

destroying the payload based on the detection of a tampering event.

18. A non-transitory computer-readable storage medium storing instructions that, when executed by a processor of an unmanned vehicle, cause the processor to perform a method for on-demand delivery, the method comprising:

receiving a command for performing a secure delivery;

determining a travel route of the unmanned vehicle based on the command;

when receiving a signal indicating a tampering even is detected, adjusting a payload state of the unmanned vehicle, wherein adjusting the payload state comprises marking the payload; and

upon receiving authentication data associated with a user, verifying an identity of the user based on the authentication data, and granting access to the payload when the identity is verified.