Chiplet Lifecycle Receipts for Observable State Transition Audits
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Solution Overview
Problem
Existing multi-die (chiplet-based) electronic systems lack a standardized, unsolicited, and externally observable mechanism for managing lifecycle transitions, leading to fragmented manageability, ambiguous timing, and difficulty in verifying interoperability and compliance across heterogeneous chiplets.
Innovation Solution
Implement a manageability receipt mechanism that emits a clear-text marker with a cryptographically bound payload at defined lifecycle state transitions, using a management director to ensure timely and validated receipt presence before enabling the next state, and utilize a ledger service to summarize and anchor these receipts for durable audit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If conventional request/response attestation mechanisms are used, then the system can obtain some manageability information, but the mechanism is not externally observable and requires polling or privileged access
Solution Approach 1:
The manageability receipt is segmented into two distinct parts: a clear-text marker that is externally observable and a cryptographically protected payload containing detailed information. This segmentation allows external observers to detect lifecycle transitions through the marker without requiring privileged access to the protected payload, thus resolving the contradiction between information availability and verification ease.
Solution Approach 2:
The manageability receipt acts as an intermediary artifact between the chiplet lifecycle state machine and external verification systems. It carries cryptographic proofs and transition evidence that bridge the gap between internal state changes and external observability, eliminating the need for polling or privileged access while maintaining security.
2Reliability
If status messages are encapsulated or fully encrypted, then security is improved, but passive tools cannot confirm that a particular transition occurred
Solution Approach 1:
The receipt structure separates information into a clear-text marker portion and a protected payload portion. The marker contains essential transition identification information in plain text, enabling passive observation, while the payload contains sensitive details protected by cryptographic mechanisms. This resolves the contradiction by providing both security and observability in different layers of the same message.
3Adaptability or versatility
If manageability features are negotiated as optional capabilities, then device flexibility is improved, but consistent records of transitions cannot be guaranteed
Solution Approach 1:
The manageability receipt mechanism is designed as a universal standard that can be implemented across heterogeneous chiplets from different vendors. The clear-text marker format and cryptographic structure provide a common interface that ensures consistent transition records regardless of the specific device capabilities or negotiation outcomes, resolving the contradiction between flexibility and consistency.
4Productivity
If existing logs are used without deterministic timing bounds, then logging overhead is reduced, but reordering and replay attacks cannot be excluded
Solution Approach 1:
The manageability receipt is generated and emitted at the precise moment of lifecycle state transition, before any potential reordering or replay can occur. The receipt includes a monotonic counter and timestamp that are established at transition time, providing deterministic timing bounds that prevent later manipulation while maintaining logging efficiency.
5Adaptability or versatility
If multiple heterogeneous chiplets are integrated, then system functionality and yield are improved, but vendor-specific manageability fragments interoperability
Solution Approach 1:
The manageability receipt defines a universal message format with clear-text markers and standardized cryptographic structures that can be used across chiplets from different vendors. This universal interface simplifies the manageability plane by providing a common language for lifecycle events, reducing the complexity that would otherwise arise from vendor-specific implementations.
Data Source
AI summary
Systems and methods provide manageability receipts for chiplet lifecycle state transitions in multi-die packages. Upon detecting a transition (e.g., discovery->enumeration, enumeration->authentication, authentication->enablement, enablement->reset/quiescence, or quiescence->retirement), logic unsolicitedly transmits on management link 1710 a receipt with (i) a clear-text marker indicating at least the event and (ii) a payload including selected fields such as chiplet identifier, topology locator, lifecycle counter, time value, measurement digest, and result, together with a cryptographic authenticator bound to a context value maintained in key boundary 1780. The marker makes the receipt externally observable at a protocol boundary; the payload may be authenticated and/or encrypted. In some embodiments, management controller 1720 conditions enablement on a validating receipt. A ledger 1740 aggregates receipt hashes as leaves 1741 in a Merkle tree 1742 and anchors 1744 commit roots; a verification interface 1750 furnishes authenticator attestations and inclusion proofs to an external verifier 1760.