Some interesting cryptography-related links…
Crypto Museum is a virtual museum in The Netherlands, that can only be visited on the internet.
Priyom is an international organization intending to research and bring to light the mysterious reality of intelligence, military and diplomatic communication via shortwave radio: number stations.
Capture of live numbers reading (in Czech).
The Conet Project
The Conet Project: Recordings of Shortwave Numbers Stations / 1111 a special edition of the legendary and first ever comprehensive collection of Numbers Stations recordings to be made public.
For more than 45 years the Shortwave radio spectrum has been used by the worlds intelligence agencies to transmit secret messages. These messages are transmitted by hundreds of “Numbers Stations”.
Another capture of live numbers reading (in Czech).