Definition - What does ASCII-Armor mean?
Techopedia explains ASCII-Armor
Although ASCII armoring is a functional part of PGP, some developers and others worry about the potential for hacking in this system. A primary concern is often called ASCII armor parser vulnerability, and is related to the idea that a cleverly constructed ASCII armored detached signature file could be used as a kind of Trojan horse to introduce a replacement .dll that could activate a virus. This is seen as one of the major holes in an otherwise very effective encryption method.