def SealAuthPSK(pkR, info, aad, pt, psk, psk_id, skS):
  enc, ctx = SetupAuthPSKS(pkR, info, psk, psk_id, skS)
  ct = ctx.Seal(aad, pt)
  return enc, ct

def OpenAuthPSK(enc, skR, info, aad, ct, psk, psk_id, pkS):
  ctx = SetupAuthPSKR(enc, skR, info, psk, psk_id, pkS)
  return ctx.Open(aad, ct)