I use several test chains while testing my software, the official test net, a standalone net in house and even chains only created on the fly for unit tests. I found no use of distinguishing serialization of keys while using any of them. If you have some deep insights about why this is needed share it, as I am not goint to guess your valuable thoughts. Regards, Tamas Blummer http://bitsofproof.com On 22.04.2014, at 17:32, Mark Friedenbach wrote: > Testnet vs mainnet is quite a separate issue than bitcoin vs altcoin. > Unfortunately few of the alts ever figured this out.