Do affine ciphers have any modern use cases?
Affine ciphers are simple substitution ciphers that were widely used in the past, but they have limited modern use cases due to their weakness and lack of security. Modern cryptography relies on much stronger encryption algorithms that are designed to resist even the most powerful computers and attackers.

However, affine ciphers can still be used in educational and learning contexts to introduce the basic concepts of cryptography, or as examples of simple encryption algorithms. In some cases, they may also be used as part of a larger encryption scheme to add an additional layer of security, but this is relatively rare.

In summary, while affine ciphers may still have some limited use in educational and learning contexts, they are not suitable for secure communication or data protection in modern systems.