4 ms·

In 1970s USSR there wasn't much outgoing international mail, so the monitoring wasn't really that expensive.

• jojobas 6y ago
  They weren't just quickly inspecting it, they found invisible ink on it.
  • 082349872349872 6y ago
    Outgoing international mail sent by a nonlocal tourist might have been a quick triage signal for the local postmaster? These days, of course, our communications pass through various boxes that can automate inspections, so no need to involve wetware. Keyword search in 1960s US: https://en.wikipedia.org/wiki/IBM_7950_Harvest#Usage https://en.wikipedia.org/wiki/IBM_7950_Harvest#Usage
    • jojobas 6y ago
      Nothing makes a "tourist" letter any more likely to be spy-related than any other letter going out of the eastern bloc, say a pen-friend letter to Sweden. They probably were inspecting all outgoing mail.
      • jacquesm 6y ago
        And as well for all the satellite states.