The crypto gardening guide

Peter Gutmann’s done it again; he’s produced a wonderful paper for crypto implementers. It posits questions like “Consider whether your design can be implemented on a system with a total of 1kB of memory, or alternatively whether it can process a 1GB data block in a machine with 128MB of memory” and offers pithy comments like “No matter how cool/interesting/useful/mandated in standards a new design is, it won’t be used if it requires redeployment of all existing hardware and
software for little apparent gain.”