The Piggy Bank Cryptographic Trope
This work addresses security vulnerabilities in cryptographic systems for classical and single-state applications, but it appears incremental as it builds on existing tropes without introducing a fundamentally new approach.
The paper tackles the problem of enhancing security in cryptographic protocols by applying the 'piggy bank' trope, where a secret is easily inserted but hard to extract, resulting in a basic two-pass scheme that uses hashing digests to detect key bit loss and improve error correction in communication systems.
This paper presents applications of the trope of the locked and sealed piggy-bank into which the secret can be easily inserted but from which it cannot be withdrawn without opening the box. We present a basic two-pass cryptographic scheme that can serve as template for a variety of implementations. Together with the sealed piggy-bank is sent a coded letter that lists and certifies the contents of the box. We show how this idea can help increase the security of cryptographic protocols for classical systems as well as those based on "single-state" systems. More specifically, we propose the use of a hashing digest (instead of the coded letter) to detect loss of key bits to the eavesdropper and use in communication systems where error correction is an important issue.