[cflsystems]

Yes this is how it will work - you can set them to FALSE to turn them off and then regenerate the blowfish key which will also regenerate these security features keys as well.

The big huge problem here is with upgrades - if you do this then you cannot sync the db later before site goes live since the new blowfish key will be different. If you use the one from the old store you are back to square one...

There is no option to "generate security keys only" so re-generating blowfish key will re-generate security keys as well but there is nothing mentioned about this in admin...