PrismKit加密與資安凱撒密碼凱撒密碼在瀏覽器中執行本機複製連結Markdown用凱撒、ROT13 或 ROT47 密碼移位字母，或依英文字母頻率排序全部 25 種位移來破解。VAT 號碼驗證器Check the format and check digits of EU and UK VAT numbers offline.維吉尼亞密碼Encrypt or decrypt with the Vigenère, Beaufort or autokey cipher and guess an unknown key with Kasiski and index-of-coincidence analysis.