sid on Nostr: What is e2ee ?

{ "id": "1711275279faff8260236ac054d354edd864ffcf7ba85c2acaa14e7ad99869ee", "pubkey": "96859d1496ab212d80629b3929fdb8fda7850f7fdd0b31fb265e6844b06bf54d", "created_at": 1725980640, "kind": 1, "tags": [ [ "e", "3d7833c2ef59d132db3910d9a198fc87123f35019b64fcd512d67a592d6b9bc1", "wss://relay.primal.net", "root" ], [ "p", "82341f882b6eabcd2ba7f1ef90aad961cf074af15b9ef44a09f9d2a8fbfbe6a2" ] ], "content": "What is e2ee ?", "sig": "be992a883e7fc22b089b55bf74852ed99b3e94fcd19e4c4da36027c0b5d94c81722fa8d216543ea6ef7ea17f85367a97ac43326c07081e2dffba6beade754376" }