For both ML-DSA and ML-KEM algorithms: 1. OpenSSL is able to create and read files in the IETF standard format, with "seed", "expandedKey" and "both" variants of the private key format 2. OpenSSL is able to read files created by the oqsprovider we shipped in RHEL-10.0 and convert them to the "expandedKey" format

.`oqsprovider` stores ML-KEM and ML-DSA private keys in a non-standard format The open quantum-safe provider for OpenSSL (`oqsprovider`) generates private keys in a format that does not conform with any of the file formats proposed by the IETF LAMPS work group. Consequently, the key files might be unreadable by other applications that follow the IETF standard and cannot be handled by applications that require providing the key in the seed format for import. Because there currently is no workaround, do not use the keys for storing long-term secrets.