With the two needle method you only need to cut one end of the strand.
I am sure the usual method is secure but I find the two needle method much neater more secure and of course there's no need to cut both ends because the strand is started in the middle of the thread.
It's hard to explain the method in words, but there are two needles on each end of Griffin silk thread, start the stringing in middle of silk thread , once the clasp and first four pearls have been threaded continue stringing pearls through both needles, don't thread the last four pearls through both needles when finishing the necklace because the thread will be too thick when back threading.
There was a tutorial on this method over ten years ago on YouTube, when I tried to find it I couldn't see it anymore.
If anyone has wondered why Griffin would make silk thread with two needles attached it's because it is meant for people who want to use this technique in their bead stringing.