Wiktionary
a. Not decoded.
Usage examples of "undecoded".
She highlighted the bit counts for the first 48 undecoded messages and tallied them up: they totaled 2,245,124 bits.
In fact, I bet he was naïve enough to think that the government wouldn’t hush up an undecoded message.
And then the next day Claire had nothing to bring him but the undecoded intercepts, because someone - Wigram shook his head in wonder '- someone very, very senior indeed, I have since discovered, had decided they just didn't want to know.
Some ancient languages, such as the glyphs of Easter Island, the writings of the Mayas, and some varieties of Cretan script, remain completely undecoded to the present time.
Peter, not a voluble man even in ordinary circumstances, was content to lean back and listen to their conversation, which touched only tangentially on the issue the Soviets had come to discuss: the third level of the palimpsest, the elaborate, complex, and still undecoded Message they were collectively receiving.