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As part of our ongoing effort to describe and specify the XRP Ledger technology, down to the deepest details, the XRP Ledger Dev Portal now has expanded documentation and sample code for the process of cryptographic key derivation. Without quite delving into the theory behind the cryptography, the new docs show the steps to go from a passphrase, to a seed, to an actual keypair that can be used to sign transactions using well-defined elliptic curve math. The new Python sample code even doubles as an offline utility for generating or deriving secret keys. (It doesn't get all the way to address encoding, so maybe that's an exercise for you, the reader, to go through!) Incidentally, if you are interested in learning the cryptography itself, an item added to my reading list as a result of this work is Modern Cryptography and Elliptic Curves by Thomas R. Shemanske, which comes heartily recommended by several members of the rippled team. I hope this work helps, in some small way, to extend the XRP Ledger technology to new platforms, new programming languages, and new use cases.
Guest posted a topic in Alt-Coins and General FintechJust curious. Is quantum computing a threat for crypto currencies? If so, are there ways to mitigate this threat?