Proof of work in CTF-wirteup

PoW-CTFjs

cosnt crypto = require('crypto')
const md5sum = str => crypto.createHash('md5').update(str).digest('hex')

function PoW(target, start, end) {
  while (true) {
    let rand = Math.random().toString(36)
    let hash = md5sum(rand).slice(start, end)
    if (hash === target) return rand
  }
}