The Australian Signals Directorate has released 50k 50c coins with secret codes to mark the cyber-spy agency's 75th anniversary. The coins contain messages hidden by four layers of encryption, all of which we've been able to decode. However, there's a fifth code and we haven't been able to find it. If you have an answer, and you're happy to part with the info, please let us know.

How Successful Advertising in History Helps Brokers Position Their Own Ads
The following section looks at advertisements from successful historic campaigns that had an impact on the manner in which the market perceived their position in



