use the HifimeDIY USB Isolator to solve a USB ground loop problem in my home recording setup. If you have a high pitched whining noise in your USB audio system, take a look at this video.

https://www.amazon.com/gp/product/B00F4SCCR2/ref=as_li_qf_sp_asin_il_tl?ie=UTF8&camp=1789&creative=9325&creativeASIN=B00F4SCCR2&linkCode=as2&tag=internati0501-20&linkId=QPGZM62EU45K5D2K

Don’t overlook using fiber optics to achieve isolation. The Navy learned to love optical fibers since they are insensitive to EMP pulses from nuclear weapons. Glass fibers are expensive, and you can expect to pay 25 to 100 dollars for the transmitters and receivers. Then again, glass fibers work to GHz frequencies. A much more cost-effective solution is plastic optical fiber (POF). Here data rates are limited to 10 or 100 MHz, but the costs are closer to 5 dollars for transceivers.

The problem with WordPress is that because of it’s popularity, many people try to hack to it.
To keep your own site secure, you need to keep you updated what problems are found and
be prepared to update your WordPress installation when new serious issues are found
(before bad people hit your site). Be prepared to be able to do that update often, or
get somebody that can do this for you at short notice.

Security problems are found every now and then on practically all popular web systems…
Whatever platform you choose, be prepared that you need it update every now and them to keep it secure.