2023: 23/24 September, 15 October, 11 November, 2/3 December, 17 December
Following the success of our previous exhibitions
Secret Communications 1,
2 and 3
— the last of which was in 2019 —
Crypto Museum and the Foundation for German Communication have once again
teamed up and are pleased to announce Secret Communications 4 — to be held in
Please note that for the first time, there are two weekends in which we will be
open on two successive days. This might be particularly useful for foreign visitors.
The exclusive exhibition Secret Communications 4 will be open to the general public
on these days:
On these days, we will be open from 10:00 to 17:00 and admission is free. Furthermore, coffee, tea and sandwiches will be available free of charge.
We will be showing an exciting collection of
cipher machines and
some of which have never been on public display before.
Check the overview below
to see what we have selected for you.
Large groups may apply for a visit outside the regular opening
days and times. Contact Crypto Museum
to make arrangements.
➤ What to expect
The exhibition will cover the following main themes:
- Enigma & Friends
Enigma is arguably the most famous and well-known
cipher machine in the world. We have shown it previously
in its many variations, with all kinds of peripherals, as it was used by the
German Third Reich during World War II for their secret communication.
This year, a new member has been added to the Enigma Family: the extremely
rare Enigma G, also known as the
Abwehr Enigma — ask for a demonstration.
- Operation Rubicon
In February 2020 it was revealed that the largest civil manufacturer of
cryptographic equipment — Crypto AG in Switzerland
— was owned by the German intelligence service BND and the American CIA.
In 1970 they had secretly purchased the company from its original
owner Boris Hagelin, as part of
It was used it to spy on more than 130 countries and organisations.
In this exhibition we will show many of the original devices that have been
with help from the NSA and others.
Apart from radio waves, (invisible) light is an interesting medium for
the transmission of speech over several kilometres.
During the Cold War, the Stasi of the former DDR used infrared light beams
for secret communication with its agents at the other side of the Berlin Wall.
In this exhibition we will show and demonstrate a range of
light communication devices
the oldest of which is from World War II.
In addition, a collection of espionage cameras and pinhole lenses from the
Cold War era.
- Washington-Moscow Hotline
In 1962, the so-called Cuban Missile Crisis almost led to the
outbreak of a nuclear war between America and the former USSR.
A year later, in 1963, it was decided to establish a direct line
of communication between the two nuclear powers, which became known
as the Washington-Moscow Hotline.
Contrary to popular believe, this was a not a red telephone,
but a teleprinter link with One-Time Tape cipher machines.
In this exhibition we will demonstrate the original machines and
Last updated 12 June 2023
Below is a non-exhaustive overview of the items we will be showing and
demonstrating in this exhibition. Further information on each item is available
by clicking the corresponding thumbnail image below.
This list will be updated regularly so please visit this page again soon.
- Visitors are required to register upon arrival.
- You are allowed to take photographs.
- Please be aware that you may be photographed by others.
- For your and our safety there will be CCTV cameras in operation. The recorded images will only be used in case of an incident and will otherwise be deleted after the event.
- Please do not touch any of the exhibited objects unless specifically permitted by our staff.
- All high-value items will be removed from the exhibition at the end of each day.
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© Crypto Museum. Last changed: Wednesday, 13 September 2023 - 14:21 CET.