Question about sgx_get_trusted_time

[Sotiri_K_]

Hello,

I recently learned about the sgx_get_trusted_time function and it is useful in my work, but I have a couple questions about it that were not answered by the reference.

1. Does the use of the sgx_get_trusted_time function (or other platform services, for that matter) require use of the internet? If so, for what reason?
2. Under what circumstances will the time_source_nonce change?

I have a couple more questions but these are the most important for now. Any and all answers are greatly appreciated.

Thanks!

[Anusha_K_Intel]

1. Does the use of the sgx_get_trusted_time function (or other platform services, for that matter) require use of the internet? If so, for what reason? - It does not require the use of internet. 

[Sotiri_K_]

Thank you for your response. Do you happen to know where I can find information about the second question as well?

[Francisco_C_Intel]

We recently posted

"Trusted Time and Monotonic Counters with Intel® Software Guard Extensions Platform Services" to the resource library: https://software.intel.com/en-us/sgx/resource-library

Please see

https://software.intel.com/sites/default/files/managed/1b/a2/Intel-SGX-Platform-Services.pdf

for more details.

Thanks