They're not privacy holes by design, but they're not privacy friendly by design either.
When these things were designed, privacy wasn't really a concern and wasn't really thought about in the way it is now. The assumptions were very different, it was assumed that only large and trusted companies could get on SS7 and those would play by the rules, or else face the wrath of the government. Now, a small carrier in a third-world country that routinely violates human rights can get that access.
When these things were designed, privacy wasn't really a concern and wasn't really thought about in the way it is now. The assumptions were very different, it was assumed that only large and trusted companies could get on SS7 and those would play by the rules, or else face the wrath of the government. Now, a small carrier in a third-world country that routinely violates human rights can get that access.