Block chain based validation of memory commands
The present disclosure includes apparatuses, methods, and systems for block chain validation of memory commands. An embodiment includes a memory, and circuitry configured to receive a command that is included in a block in a block chain for validating commands to be executed on the memory, wherein the command includes an anti-replay portion that is based on a previous command included in a previous block in the block chain, validate the command using the anti-replay portion of the command, and execute the command on the memory upon validating the command.
1. An apparatus, comprising:
a memory; and
a controller to:
receive a command that is included in a block in a block chain for validating commands to be executed on the memory, wherein the command includes an anti-replay portion that is based on a previous command included in a previous block in the block chain;
validate the command using the anti-replay portion of the command, wherein validating the command includes ensuring the command has not been previously executed on the memory; and
execute the command on the memory upon validating the command.
2. The apparatus of claim 1 , wherein:
the command includes a signature associated with a host; and
the controller is to validate the command using the signature of the command.
3. The apparatus of claim 1 , wherein:
the controller includes a register to store an anti-replay portion of the previous command; and
the controller is to validate the command using the anti-replay portion of the previous command stored in the register.
4. The apparatus of claim 3 , wherein the controller is to validate the command by:
generating a cryptographic hash of the anti-replay portion of the previous command stored in the register; and
comparing the generated cryptographic hash with the anti-replay portion of the command.
5. The apparatus of claim 3 , wherein the controller is to validate the command by:
generating a digital signature for the anti-replay portion of the previous command stored in the register; and
comparing the generated digital signature with the anti-replay portion of the command.
6. The apparatus of claim 1 , wherein:
the command and the previous command are included in a sequence of commands to be executed on the memory;
the block in the block chain in which the command is included includes an indication of a position of the command in the sequence of commands; and
the controller is to validate the command using the indication of the position of the command.
7. A method of operating memory, comprising:
receiving a command from a host, wherein:
the command is included in a block in a block chain for validating commands to be executed on the memory; and
the command includes an anti-replay portion that is based on a previous command included in a previous block in the block chain;
validating the command using the anti-replay portion of the command, wherein validating the command includes ensuring the command has not been previously executed on the memory; and
executing the command on the memory upon validating the command.
8. The method of claim 7 , wherein the method includes sending a command response to the host upon executing the command on the memory, wherein the command response includes:
a result of the execution of the command; and
the anti-replay portion of the command.
9. The method of claim 7 , wherein validating the command using the anti-replay portion of the command includes:
comparing the anti-replay portion of the command to an expected value for the anti-replay portion of the command; and
validating the command upon the comparison indicating the anti-replay portion of the command matches the expected value.
10. The method of claim 9 , wherein the expected value for the anti-replay portion of the command is a cryptographic hash of an anti-replay portion of the previous command.
11. The method of claim 9 , wherein the expected value for the anti-replay portion of the command is a signature for an anti-replay portion of the previous command.
12. The method of claim 7 , wherein the method includes:
receiving an additional command from the host, wherein:
the additional command is included in a subsequent block in the block chain; and
the additional command includes an anti-replay portion that is based on the command included in the block in the block chain;
validating the additional command using the anti-replay portion of the additional command; and
executing the additional command on the memory upon validating the additional command.
13. A method of operating memory, comprising:
generating an anti-replay portion for validating a command to be executed on the memory, wherein:
the command is included in a block in a block chain for validating commands to be executed on the memory; and
the anti-replay portion for the command is generated from a previous command included in a previous block in the block chain; and
validating the command includes ensuring the command has not been previously executed on the memory; and
sending the command having the anti-replay portion to the memory.
14. The method of claim 13 , wherein the anti-replay portion for the command is a cryptographic hash of an anti-replay portion of the previous command.
15. The method of claim 14 , wherein the cryptographic hash comprises a SHA-256 cryptographic hash.
16. The method of claim 13 , wherein the anti-replay portion for the command is a signature for an anti-replay portion of the previous command.
17. The method of claim 16 , wherein the signature comprises an elliptical curve digital signature.
18. The method of claim 16 , wherein the signature is a digital signature generated using asymmetric cryptography.
19. The method of claim 16 , wherein the signature is generated using symmetric cryptography.
20. A system, comprising:
a host having a host controller; and
a memory device having a memory and a controller;
wherein the host controller is to:
generate an anti-replay portion for a command to be executed on the memory, wherein:
the command is included in a block in a block chain for validating commands to be executed on the memory; and
the anti-replay portion for the command is generated from a previous command included in a previous block in the block chain; and
send the command having the anti-replay portion to the memory device; and
wherein the controller of the memory device is to:
validate the command using the anti-replay portion, wherein validating the command includes ensuring the command has not been previously executed on the memory; and
execute the command on the memory upon validating the command.
21. The system of claim 20 , wherein:
the controller of the memory device is to send a command response to the host upon executing the command on the memory, wherein the command response includes:
a result of the execution of the command; and
the anti-replay portion; and
the host controller is to validate the result of the execution of the command using the anti-replay portion.
22. The system of claim 21 , wherein:
the command response includes a signature associated with the memory device; and
the host controller is to validate the result of the execution of the command using the signature.
23. The system of claim 20 , wherein the host controller is to generate an anti-replay portion for an initial command included in an initial block in the block chain from a random value generated by the host.
24. The system of claim 23 , wherein the host controller is to generate the anti-replay portion for the initial command responsive to a powering of the memory device.