This paper introduces calyptography, a novel method for secure secret storage that combines principles from steganography and cryptography without altering the carrier media. Unlike traditional cryptographic systems, which rely solely on passphrases or keys, or steganographic systems, which embed data into a cover medium, calyptography links a secret to an unmodified image via a robust perceptual hash. The proposed system derives encryption and decryption keys from both a user passphrase and the perceptual features of a reference image, allowing secure storage while resisting typical image transformations such as compression, filtering, or rescaling. A detailed method based on DCT-based image hashing and randomized patch extraction is presented, alongside error correction techniques that preserve key robustness without reducing entropy. Experimental results show the method’s high robustness against common image manipulations compared to traditional perceptual hashing schemes, making calyptography a promising alternative for secure and user-friendly secret management.