Worked on enhancing cryptographic libraries by implementing TPM 1.2 Endorsement Key certificate support and improving SPKI handling for RSA keys in both the openssl/openssl and aws/aws-lc repositories. Focused on mapping rsaesOaep SubjectPublicKeyInfo to RSA, enabling proper decoding and validation of TPM EK certificates through functions like X509_get_pubkey() and X509_verify_cert(). Updated test certificates to use SHA-256, aligning with current security standards and improving reliability. Employed C and C++ for development, with an emphasis on cryptography and software testing. Delivered robust test coverage and ensured compatibility across modern security requirements within a one-month period.