About transfer of digital signature, cipher related files
On iPhone/iOS, it seems that some special measures have been taken to transferfiles and accept transfers for files whose file extensions are as follows:
Therefore, it is impossible to transfer or accept files with such extensions.
If you change the extension or remove the extension, it seems that you will be ableto transfer and accept transfers.
rsac has not addressed this issue at this time.
Therefore, you can not transfer a file whose extension is this, or accept the transfer.
If you want to use rsac to transfer files with this extension or to accepttransfers, please change the extension or remove the extension.
At this time, rsac does not have plans to address this issue.