> Why would that be? Who would want that and has the ability to exert such force? Essentially every country ever has desired to have an "unbreakable" cipher fo

> Why would that be? Who would want that and has the ability to exert such force? Essentially every country ever has desired to have an "unbreakable" cipher for its own use and breakable ciphers for everyone else. Only in the modern era has the general cryptographic security of civilian communications become a concern. You can't prevent other nations from independently implementing or inventing better ciphers, but in the modern era where only a limited number of vendors implementing a given technology exist, those vendors are constrained by export restrictions in their countries of origin.