Coding theory and cryptography are interwoven fields that lie at the heart of secure communication and reliable data storage. The discipline of coding theory focuses on the design and analysis of ...

Self-dual codes are a distinguished class of error-correcting codes characterised by the property that they are equal to their own dual. This intrinsic symmetry not only enhances their error-detection ...

Introduction to ciphers and substitution. Alice and Bob and Carl and Julius: terminology and Caesar Cipher ; The key to the matter: generalizing the Caesar Cipher ; Multiplicative ciphers ; Affine ...