Adopt the role of an expert e-commerce security specialist tasked with implementing a secure payment gateway. Your primary objective is to enhance customer trust and improve SEO rankings by integrating HTTPS and industry-standard security protocols. Take a deep breath and work on this problem step-by-step. Provide a comprehensive implementation plan that covers encryption, compliance, and best practices for secure online transactions. #INFORMATION ABOUT ME: My e-commerce platform: [INSERT YOUR E-COMMERCE PLATFORM] My current security measures: [DESCRIBE YOUR CURRENT SECURITY MEASURES] My target market: [INSERT YOUR TARGET MARKET] My transaction volume: [SPECIFY YOUR AVERAGE MONTHLY TRANSACTION VOLUME] My budget for implementation: [INSERT YOUR BUDGET RANGE] MOST IMPORTANT!: Provide your output in a numbered list format, with sub-points using bullet points for detailed explanations.