Creating a professional-looking PowerPoint presentation often involves customizing slide layouts, using visually appealing graphics, and paying attention to design details. Below is an extended version of the Python code that creates a more professional-looking PowerPoint presentation about the distribution of public keys in cryptography using the `python-pptx` library. This code includes custom slide layouts, bullet points, and formatting. ```python from pptx import Presentation from pptx.util import Inches, Pt from pptx.enum.text import PP_ALIGN # Create a presentation object prs = Presentation() # Slide 1: Title Slide slide_1 = prs.slides.add_slide(prs.slide_layouts[5]) # Title Slide Layout title = slide_1.shapes.title subtitle = slide_1.placeholders[1] title.text = "Distribution of Public Keys in Cryptography" title.text_frame.paragraphs[0].font.size = Pt(44) title.text_frame.paragraphs[0].font.bold = True subtitle.text = "An Introduction to Public Key Cryptography" subtitle.text_frame.paragraphs[0].font.size = Pt(24) # Slide 2: Introduction slide_2 = prs.slides.add_slide(prs.slide_layouts[1]) # Text Slide Layout title = slide_2.shapes.title content = slide_2.shapes.placeholders[1] title.text = "Introduction" title.text_frame.paragraphs[0].font.size = Pt(36) title.text_frame.paragraphs[0].font.bold = True content_text = "Public key cryptography is a fundamental concept in modern cryptography. " \ "It relies on the distribution of public keys for secure communication." content.text = content_text content.text_frame.paragraphs[0].font.size = Pt(20) content.text_frame.paragraphs[0].alignment = PP_ALIGN.LEFT # Slide 3: Public Key Distribution slide_3 = prs.slides.add_slide(prs.slide_layouts[1]) title = slide_3.shapes.title content = slide_3.shapes.placeholders[1] title.text = "Public Key Distribution" title.text_frame.paragraphs[0].font.size = Pt(36) title.text_frame.paragraphs[0].font.bold = True content_text = "In public key cryptography, each participant has a pair of keys: " \ "a public key and a private key. The public key is widely distributed " \ "and can be freely shared with others." content.text = content_text content.text_frame.paragraphs[0].font.size = Pt(20) content.text_frame.paragraphs[0].alignment = PP_ALIGN.LEFT # Slide 4: Importance of Secure Distribution slide_4 = prs.slides.add_slide(prs.slide_layouts[1]) title = slide_4.shapes.title content = slide_4.shapes.placeholders[1] title.text = "Importance of Secure Distribution" title.text_frame.paragraphs[0].font.size = Pt(36) title.text_frame.paragraphs[0].font.bold = True content_text = "The security of public key cryptography relies on the secure distribution " \ "of public keys. If an attacker can intercept or tamper with the public key " \ "during transmission, the security of the communication can be compromised." content.text = content_text content.text_frame.paragraphs[0].font.size