Your personalized name is recorded on IOV's own blockchain, called the BNS, or Blockchain Name Service. Registries are unique, so nobody can have the same name. Public records and public/private key cryptography makes the name inherently secure.
A personalized name registry includes a place to record public keys from a variety of blockchains, including Ethereum, Rise, Lisk and soon many others.
Your name connects automatically with an IOV wallet, so you can begin trading digital assets directly with others, no matter which blockchain the assets are recorded on.