These controls are typically imposed by governments to regulate the export of technologies that could have national security implications. In practical terms, it means that if you plan to export or use this processor in certain regions or applications, you may need to comply with specific export regulations and restrictions related to cryptographic technology.
It means SEC implements cryptographic algorithms that are subject to United States Government export control regulations. Please refer ls1043a SECRM section 3.3 SEC Export-Controlled vs. non Export-Controlled Versions for more details.
Thanks for the detailed reply Khushbur. To confirm my understanding, can you check the reply I wrote? -> If the P/N contains "E" such as LS1043ABE9PQB, then the SEC is available. Is this right?