Security key derivation using decoded information blocks

An apparatus for wireless communication at first wireless device, comprising:

• a processor;
• memory coupled with the processor;
• and
• instructions stored in the memory and executable by the processor to cause the apparatus to:
• transmit, to a second wireless device via an uplink shared channel or a downlink shared channel, a first message, the first message comprising one or more first information blocks encoded based at least in part on a first key;
• receive, from the second wireless device, an indication that the one or more first information blocks have been successfully decoded, wherein the one or more decoded information blocks are associated with an application of the second wireless device;
• and
• communicate, with the second wireless device via an uplink control channel or a downlink control channel, a second message, wherein the second message comprises information that is encoded based at least in part on a second key that is derived from at least a portion of the one or more decoded first information blocks.

A method for wireless communication at a first wireless device, comprising:

• receiving, from a second wireless device via an uplink shared channel or a downlink shared channel, a first message, the first message comprising one or more first information blocks encoded based at least in part on a first key, wherein the one or more first information blocks are associated with an application of the first wireless device;
• transmitting, to the second wireless device, an indication that the one or more first information blocks have been successfully decoded;
• passing the decoded one or more first information blocks to the application;
• and
• communicating, with the second wireless device, a second message via an uplink control channel or a downlink control channel, wherein the second message comprises information that is encoded based at least in part on a second key that is derived from at least a portion of the decoded one or more first information blocks.

A method for wireless communication at first wireless device, comprising:

• transmitting, to a second wireless device via an uplink shared channel or a downlink shared channel, a first message, the first message comprising one or more first information blocks encoded based at least in part on a first key;
• receiving, from the second wireless device, an indication that the one or more first information blocks have been successfully decoded, wherein the one or more decoded information blocks are associated with an application of the second wireless device;
• and
• communicating, with the second wireless device via an uplink control channel or a downlink control channel, a second message, wherein the second message comprises information that is encoded based at least in part on a second key that is derived from at least a portion of the one or more decoded first information blocks.