Understanding Security Vulnerabilities: A First Step in Preventing Attacks

When I was a teenager, our local telephone company introduced a new service - the premium phone calls (AKA 1-900 numbers). The fun part was that we discovered a workaround to these charges by dialing the sequential local numbers which these 1-900 numbers would redirect to. If the "support number" for the 1-900 was 555-555 we would dial every number between 555-455 and 555-655 until we hit the jackpot...

Hours were spent dialing these numbers, leading us to make numerous …

attacks beginners charges fun java local numbers phone phone calls premium security service support telephone tutorial understanding vulnerabilities workaround