Seonpyo Kim

@ValarDragon Thank you very much. We'll study the paper especially about mBCJ and examine the usability of it.

I searched with the keyword `impl Encodable` but there was no such results. I think this issue was isolated a long time ago.

To Apply this change, we should consider all the dependencies using secret keys' data from the bottom. codechain-keystore-js is dependent on codechain-primitives-js which is dependent on [the indutny's elliptic curve...

One similar issue is here: https://github.com/ethereumjs/ethereumjs-wallet/issues/89. I failed to find some guidelines about keeping private information secret in javascript implementations. Currently, many external libraries are using immutable `string` type to...