PhoneGap->NodeJS: Request NodeJS->PhoneGap: Challenge PhoneGap->NodeJS: Username & Password NodeJS->PhoneGap: Token & Unique Key PhoneGap->NodeJS: Request & Unique Key NodeJS->DynamoDB: Action DynamoDB->NodeJS: Response NodeJS->PhoneGap: Response & Unique Key PhoneGap->NodeJS: Request & Unique Key NodeJS->DynamoDB: Action DynamoDB->NodeJS: Response NodeJS->PhoneGap: Response & Unique Key