Opaque by design
Conversation content is encrypted on your device. The provider handles ciphertext, not plaintext.
Whispurr service provider
Whispurr Encrypted Backup (Development) stores opaque encrypted objects for Whispurr. It can verify that uploads arrived intact without receiving the keys needed to read your conversations.
Conversation content is encrypted on your device. The provider handles ciphertext, not plaintext.
Asynchronous checks confirm uploaded objects before Whispurr advances its durable checkpoint.
Signed, revocable attachments keep backup authority separate for each conversation.