Worked on security-critical maintenance for the openssl/openssl repository, focusing on improving memory safety in the HPKE decrypt path. Addressed a bug in the hpke_decrypt_encch function by correcting an off-by-one error in the bounds check for the extensions length field, which prevented potential uninitialized memory reads during ECH-enabled TLS handshakes. Utilized C programming and security engineering skills, leveraging static analysis tools such as RAPTOR and CodeQL to validate the fix and confirm its scope. Collaborated with reviewers to ensure the patch was robust before merging, ultimately enhancing the reliability and security of cryptographic operations in OpenSSL.