How does the JPEG file format make it easier to hide payloads compared to PNG?

JPEG files lack checksums for image data, making it simpler to inject payloads without detection. Unlike PNG, which uses CRC checksums to verify data integrity, JPEG allows modifications like appending data at the end, inserting custom COM comments, or altering marker codes (e.g., 0xFF 0xFE) without affecting image rendering. This flexibility is explored in Steganography Techniques - Hiding Payloads Using JPEG File Format and contrasts with the more rigid PNG format approach.