Secure multi-party protocol

A computer system comprising:

• a processor;
• and
• a computer readable medium coupled with the processor, the computer readable medium comprising code executable to perform a method for securing communications between a first computer and a second computer, the method comprising:
• securing an application programming interface at least in part by:
• receiving from the first computer over a communications network, a request data packet, the request data packet of the application programming interface, the request data packet including a first control block comprising a first symmetric key, and a first data block encrypted with the first symmetric key, wherein the first control block is encrypted with a public key of a public-private key pair;
• decrypting the first control block with a private key of the public-private key pair;
• extracting from the first control block, the first symmetric key;
• decrypting the encrypted first data block with the extracted first symmetric key;
• generating a second symmetric key using a predetermined algorithm based on data in the first control block;
• generating a response data packet of the application programming interface, the response data packet comprising a second control block comprising the first symmetric key, and a second data block;
• and
• transmitting the response data packet to the first computer over the communications network.

One or more non-transient computer-readable media having collectively stored thereon computer-executable instructions that, when executed with one or more computers, collectively perform a method comprising:

• securing an application programming interface at least in part by:
• receiving, by a second computer from a first computer over a communications network, a request data packet of the application programming interface, the request data packet including a first control block comprising a first symmetric key, and a first data block encrypted with the first symmetric key, wherein the first control block is encrypted with a public key of a public-private key pair;
• decrypting, by the second computer, the first control block with a private key of the public-private key pair;
• extracting, by the second computer, the first symmetric key from the first control block;
• decrypting, by the second computer, the encrypted first data block with the extracted first symmetric key;
• generating, by the second computer, a second symmetric key using a predetermined algorithm based on data in the first control block;
• generating, by the second computer, a response data packet of the application programming interface, the response data packet comprising a second data block and a second control block comprising the first symmetric key;
• and
• transmitting, by the second computer, the response data packet to the first computer over the communications network.