Blockchain in a Nutshell
&gt; The choice of cryptography to use determines the performance and guarantees of the blockchain. For example, Dogecoin blockchain clones Bitcoin but using simpler cryptographic functions to increase transaction throughput; the mining in Dogecoin is based on SCRYPT which is faster and easier to run than SHA256 used in Bitcoin. This, however, results in weaker security, less robust to attacks by dishonest nodes.<p>1. Isn&#x27;t scrypt a key-derivation-function, and thus (by design) much slower and more work intensive than SHA-256 (a cryptographic hash)??<p>2. Isn&#x27;t anyway difficulty adjusted depending on the available hash power (such that a target block rate is reached), so that &quot;faster and easier to run than SHA256&quot; does not make any sense at all?<p>Have the authors even understood PoW?