Secure asynchronous communications

A non-transitory computer-readable storage medium storing instructions for securely sending asynchronous messages, the instructions comprising instructions for:

• at a first component of a computer network:
• obtaining a first signing key from a key manager system;
• using the first signing key to create an authentication code of a message content;
• and
• transmitting a message comprising the message content and the authentication code, via an asynchronous messaging system, to a second component of the computer network;
• and
• at the second component of the computer network system:
• receiving, via the asynchronous messaging system, the message comprising the message content and the authentication code;
• in response to receiving the message:
• retrieving a second signing key corresponding to the first signing key;
• and
• using the second signing key and the authentication code to authenticate the message content.

A system for securely sending asynchronous messages, the system comprising two or more components of a computer network and memory storing instructions that, when executed, cause the system to:

• at a first component of a computer network:
• obtain a first signing key from a key manager system;
• use the first signing key to create an authentication code of a message content;
• and
• transmit a message comprising the message content and the authentication code, via an asynchronous messaging system, to a second component of the computer network;
• and
• at the second component of the computer network system:
• receive, via the asynchronous messaging system, the message comprising the message content and the authentication code;
• in response to receiving the message:
• retrieve a second signing key corresponding to the first signing key;
• and
• use the second signing key and the authentication code to authenticate the message content.