A gold colored metal and enamel device 1 1/8 inches (2.86 cm) in width overall consisting of a gold key, ward slanted upward to right behind the shafts of two pikes; all encircled by a continuous oval-shaped scroll passing through the bow of the key, behind the pike heads, keyward and over the pike staffs and bearing the inscription in black letters "SILENT SENTINEL."
The key, symbol for security and secrecy and the pikes, weapons used by sentries in the middle ages, symbolize the basic mission of the organization. The shape of the bow of the key and the two pikes further simulates the numerical designation of the organization.
The distinctive unit insignia was originally approved for the 344th Army Security Agency Battalion on 20 December 1966. It was redesignated for the 344th Military Intelligence Battalion on 2 May 1990.