Because I completed yesterday's Daily T4(77,92,99) with the fractal god , I only got 27 Fractal Encryption. (It should be 29)
So I took a hard look at the Fractal Encryption information
I read this in wiki
(The Chaos Isles Fractal, Nightmare Fractal and the Deepstone Fractal give 1 extra Fractal Encryption on scales below 40 and 2 extra Fractal Encryption on scales higher than 40.)
(Fractals of the Mists - Guild Wars 2 Wiki (GW2W))
But it seems siren's reef will also have extra Fractal Encryption(Because today's rec has Siren's Reef(54))
I haven't done any more testing, and I wonder if there are other places that have extra Fractal Encryption
(For example Shattered Observatory, for Molten Boss, Sunqua Peak, Twilight Oasis?)