Abstract: Techniques are disclosed relating to application verification. In various embodiments, a computing device includes a secure circuit configured to maintain a plurality of cryptographic keys of the computing device. In such an embodiment, the computing device receives, from an application, a request for an attestation usable to confirm an integrity of the application, instructs the secure circuit to use one of the plurality of cryptographic keys to supply the attestation for the application, and provides the attestation to a remote computing system in communication with the application. In some embodiments, the secure circuit is configured to verify received metadata pertaining to the identity of the application and use the cryptographic key to generate the attestation indicative of the identity of the application.

Abstract: A geosynthetic clay liner is provided for installation in landfill sites equipped with lower drainage systems. The self-sealing bentonite mat precludes substantial migration of bentonite downward during activation thereby avoiding clogging of the drainage systems with activated bentonite. Overlap extensions disposed on outer edges of the liners effectively contain the activated bentonite. The bentonite mat, or geosynthetic clay liner, does not require a first protective layer of geotextile material disposed below the bentonite clay liners to protect the drainage system.