return {
encryptCertificate = function(cert)
  local crt={A=50,B=51,C=52,D=53,E=54,F=55,G=56,H=57,I=58,J=59,K=60,L=61,M=62,N=63,O=64,P=65,Q=66,R=67,S=68,T=69,U=70,V=71,W=72,X=73,Y=74,Z=75}
  local final = ""
  for i = 1, cert:len() do
    local k = cert:sub(i,i)
    if not tonumber(k) then
      final = final .. crt[string.upper(cert:sub(i,i))]
    else
      final = final .. "0" .. tostring(k)
    end
  end
  return final
end,
decryptCertificate = function(cert)
  local crt={[50]="A",[51]="B",[52]="C",[53]="D",[54]="E",[55]="F",[56]="G",[57]="H",[58]="I",[59]="J",[60]="K",[61]="L",[62]="M",[63]="N",[64]="O",[65]="P",[66]="Q",[67]="R",[68]="S",[69]="T",[70]="U",[71]="V",[72]="W",[73]="X",[74]="Y",[75]="Z"}
  local final = ""
  if cert:len() % 2 > 0 then return final end
  for i = 1, cert:len(), 2 do
	local k = tonumber(i)
	if crt[k] then
		final = final .. tostring(crt[k])
	else
		final = final .. tostring(k:sub(2,2))
	end
  end
  return final
end}