Before you could just install your own NSA-level security suite on your smartphone, securing lines demanded hardware. From cabinet-sized cipher machines to the eavesdrop-evading combat radios, our friends at Oobject have assembled nine of the coolest secured handsets in American history.

Be sure to also check out these vintage spy radios, these brick-phones, and some awesome retro videophones.

Moscow Washington Red hotline Telephone used during Carter administration

In some ways this is an anti-crypto device since the introduction of the famous hotline was as a result of the time taken to decode messages during the Cuban Missile Crisis.

STU-1 secure phone desk set, 1970s

Called the Stew phone, three models were produced, until the current STE set replaced them in 2008.

STU III phone, 1987-2008

The picture shows Bush using the phone after the 911 attacks.

Current US secure phone, STE, 2008 on

This replaces and is backward compatible with the STU-III

SIGSALY secure speech system used in WWII

SINCGARS Secure Combat Net Radio, US present day

STU-II secure phone, US, 1980s to present

Shown here is both the headset and the secure message hardware, below.

Navajo-I secure travel phone for US govt officials 1980s

KY-3 Secure Phone, NSA 1960s