If anyone is interested, we (www.secfirst.org) just launched an Android open source app called Umbrella, which has lessons like this, along with a ton of other digital and physical security stuff. Everything from secure email to dealing with kidnap:<p><a href="https:&#x2F;&#x2F;play.google.com&#x2F;store&#x2F;apps&#x2F;details?id=org.secfirst.umbrella" rel="nofollow">https:&#x2F;&#x2F;play.google.com&#x2F;store&#x2F;apps&#x2F;details?id=org.secfirst.u...</a>