It’s basically not possible to have a backdoor in e2e encryption
That depends on the encryption method. No one is publicly aware of the standards having backdoors (with a few exceptions), but proprietary encryption implementations can definitely have backdoors.
This has occasionally been a requirement for export-controlled technology (e.g., a mandated maximum key size). And it has occasionally led to the unintended side effect of creating backdoors in the full-strength/domestic/non-export models due to poor implementation.
Indeed.
That depends on the encryption method. No one is publicly aware of the standards having backdoors (with a few exceptions), but proprietary encryption implementations can definitely have backdoors.
This has occasionally been a requirement for export-controlled technology (e.g., a mandated maximum key size). And it has occasionally led to the unintended side effect of creating backdoors in the full-strength/domestic/non-export models due to poor implementation.