System for and method of authenticating a component of an electronic device

A system for generating an encrypted and authenticated message for authenticating a first component of the system as an originator of the message, the system comprising:

• a processor;
• a non-transitory computer-readable medium comprising instructions;
• the first component comprising a first memory, the first component being operatively connected to the processor;
• a second component comprising a second memory, the second component being operatively connected to the processor and the first component;
• the processor, upon executing the instructions being configured to cause:
• receiving noise information;
• generating a block of information comprising the noise information;
• encrypting, at the first component, the block of information based on a first encryption key acquired from the first memory associated with a second decryption key in the second memory of the second component so as to generate an encrypted block of information;
• accessing, from the first memory, a first previous version of a first dynamic unique key, the first previous version of the first dynamic unique key being at least partially based on a first original unique key;
• generating, at the first component, a first current version of the first dynamic unique key based on the first previous version of the first dynamic unique key;
• generating, at the first component, a message authentication code (MAC) based on the encrypted block of information and the first current version of the first dynamic unique key;
• transmitting, by the first component to the second component, the encrypted block of information and the MAC;
• receiving, at the second component, the message comprising the encrypted block of information and the message authentication code;
• accessing, from a second memory of the second component, a second previous version of a second dynamic unique key, the second previous version of the second dynamic unique key being at least partially based on a second original unique key and a previous version of the noise information;
• generating a second current version of the second dynamic unique key based on the second previous version of the dynamic unique key;
• generating, at the second component, a control MAC based on the received encrypted block of information and the second current version of the second dynamic unique key;
• upon determining that the control MAC matches the MAC, determining that the message is authentic and that therefore the first component originated the message;
• wherein encrypting the block of information is further based on a nonce, and wherein the processor is further configured to cause, after generating the second current version of the second dynamic unique key based on the second previous version of the dynamic unique key:
• accessing, from the second memory of the second component, a previous acknowledgment key;
• generating, at the second component, a current acknowledgment key based on the previous acknowledgment key and the noise;
• generating, at the second component, a current acknowledgment message based on the current acknowledgment key and the nonce;
• and
• transmitting, to the first component, the current acknowledgment message.

A system for generating an encrypted and authenticated message for authenticating a first component of the system as an originator of the message, the system comprising:

• a processor;
• a touch screen controller;
• a non-transitory computer-readable medium comprising instructions;
• the first component comprising a first memory, the first component being operatively connected to the processor;
• a second component comprising a second memory, the second component being operatively connected to the processor and the first component;
• the processor, upon executing the instructions being configured to cause:
• receiving noise information collected from an environment of the touch screen controller;
• generating a block of information comprising the noise information;
• encrypting, at the first component, the block of information based on a first encryption key acquired from the first memory associated with a second decryption key in the second memory of the second component so as to generate an encrypted block of information;
• accessing, from the first memory, a first previous version of a first dynamic unique key, the first previous version of the first dynamic unique key being at least partially based on a first original unique key;
• generating, at the first component, a first current version of the first dynamic unique key based on the first previous version of the first dynamic unique key;
• generating, at the first component, a message authentication code (MAC) based on the encrypted block of information and the first current version of the first dynamic unique key;
• transmitting, by the first component to the second component, the encrypted block of information and the MAC;
• receiving, at the second component, the message comprising the encrypted block of information and the message authentication code;
• accessing, from a second memory of the second component, a second previous version of a second dynamic unique key, the second previous version of the second dynamic unique key being at least partially based on a second original unique key and a previous version of the noise information;
• generating a second current version of the second dynamic unique key based on the second previous version of the dynamic unique key;
• generating, at the second component, a control MAC based on the received encrypted block of information and the second current version of the second dynamic unique key;
• upon determining that the control MAC matches the MAC, determining that the message is authentic and that therefore the first component originated the message;
• encrypting the block of information is further based on a nonce;
• and
• the processor is further configured to cause generating a block of information comprising a concatenation of the nonce and the noise.