What are types of digital forgery?
Digital forgery refers to the manipulation, alteration, or creation of digital content (images, videos, documents, signatures, audio, etc.) with the intent to deceive, often for fraud, misinformation, identity theft, or creating false evidence. It spans several domains, including digital image/video manipulation, document forgery, signature forgery, and cryptographic forgery (e.g., digital signatures in cybersecurity contexts). Here are the main types of digital forgery, grouped by category: 1. Image Forgery (Most Common in Digital Forensics) These involve tampering with digital photographs or graphics, often using tools like Photoshop, GIMP, or AI. Copy-Move Forgery (also called Cloning) A portion of the image is copied and pasted elsewhere in the same image to hide/remove objects or duplicate elements (e.g., duplicating grass to cover a person). Image Splicing (or Compositing) Parts from two or more different images are combined into one new image (e.g., pasting someone's face onto another person's body). Image Retouching (or Enhancement) Subtle modifications like smoothing skin, changing colors, removing minor blemishes, or slight object removal — often not intended to deceive drastically but can cross into forgery when used misleadingly. Other related image manipulations sometimes classified separately include re-sampling, resizing with artifacts, or adding/removing objects via inpainting. 2. Video & Audio Forgery Deepfakes AI-generated or heavily manipulated videos/audio (especially faces or voices) that make it appear someone said/did something they didn't (very prevalent since ~2017–2018 with GAN technology). Video Splicing / Frame Manipulation Inserting, deleting, or altering frames/sequences in a video. Voice Cloning / Audio Deepfakes Synthetic audio that imitates a real person's voice. 3. Digital Document Forgery Tampering with PDFs, scanned IDs, certificates, contracts, or other electronic documents (altering text, dates, signatures, photos via editing software). Creating entirely fake digital documents that mimic official formats (fake diplomas, passports, invoices). 4. Digital Signature & Cryptographic Forgery Forged Digital Signatures (in the cryptographic sense) Creating fake electronic signatures without access to the private key — ranges from existential forgery (any valid signature), selective forgery (signature on chosen message), to universal forgery (signature on any message). Forged Electronic Signatures (in practice) Replicating someone's digital signature image, manipulating e-signature platforms, or using stolen/stolen credentials. 5. Other / Emerging Types AI-Generated Content Forgery (beyond deepfakes) — fully synthetic images, text, or documents created by generative AI passed off as real. Metadata Manipulation — altering EXIF data (location, timestamp, camera info) to support a false narrative. Digital forgery has become dramatically easier due to accessible editing tools, smartphones, and powerful AI. Detection relies on passive forensics (analyzing inconsistencies in noise, lighting, compression artifacts, etc.) or active methods (watermarks, blockchain provenance). If you're interested in a specific subtype (e.g., image forgery detection techniques, deepfake examples, or legal implications), let me know!