The wear-levelling feature of SSDs -- based on an algorithm that erases and writes data evenly across all the cells on a memory chip to prevent some from wearing out faster than others -- makes files harder to completely erase, Wiens said.
Is it true that SSD drives unlike standard Hard Drives can't be completely wiped to DoD standards due to the wear-leveling algorithm?
Article is talking about hacking flash-based disks. It has nothing to do with security of the data once you wiped it. Unlike traditional hard drives that require multiple wipes to securely wipe magnetic part of the disk flash doesnt require so many re-writes. Gdisk wipes hard disk (of flash disk) number of times to comply with goverment regulations so I believe that gdisk wipe is secure on flashes just as it is secure on hard disks.