Add Usama's slide deck

README.md

@@ -13,6 +13,7 @@ Meeting recordings [playlist](https://www.youtube.com/playlist?list=PLmfkUJc39uM
 
 | Date | Track | Presentation | Presenter | Materials |
 | --- | --- | --- | --- | --- |
+| 2022-09-27 | | Proposal: Addressing 3 Key Problems of Attestation in Confidential Computing | Muhammad Usama Sardar (@muhammad-usama-sardar) | <ul><li>[slides](materials/MuhammadUsamaSardar_3_problems.pdf)</li></ul> |
 | 2022-09-27 | secure channel establishment | Attested TLS harmonisation | Thomas Fossati (@thomas-fossati) | <ul><li>[slides](materials/ThomasFossati_TLSAttest_harmonise.pdf)</li></ul> |
 | 2022-08-30 and 2022-09-13 | secure channel establishment | Interoperable Attested TLS | Shanwei Cen (@shnwc) | <ul><li>[slides](materials/ShanweiCen_Interoperable_ATLS.pdf)</li></ul> |
 | 2022-08-02 | secure channel establishment | A TLS+CWT (v2) implementation in mbedTLS | Ionut Mihalcea (@ionut-arm) & Thomas Fossati (@thomas-fossati) | <ul><li>[slides](materials/IonutMihalcea_TLS-CWT++.pdf)</li></ul> |