diff --git a/doc/misc/SIT b/doc/misc/SIT
deleted file mode 100644
index b4f62020ac..0000000000
--- a/doc/misc/SIT
+++ /dev/null
@@ -1,92 +0,0 @@
-Copyright (C) 2014, 2016  Internet Systems Consortium, Inc. ("ISC")
-
-This Source Code Form is subject to the terms of the Mozilla Public
-License, v. 2.0. If a copy of the MPL was not distributed with this
-file, You can obtain one at http://mozilla.org/MPL/2.0/.
-
-		Source Identity Token
-
-Source Identity Token (SIT) is based in Donald Eastlake 3rd's DNS Cookies[1].
-
-The main differences are that the error code has been dropped and
-that the server cookie doesn't have a fixed length and may be
-missing.
-
-The error code has been dropped because it served no useful purpose
-for us.  If it was to be restored it should be the first element
-of the option.
-
-We extended the server cookie to transmit server time and to include
-a server generated nonce.  The purpose of these is to provide a
-short window of time (1 hour with a 5 minutes of clock skew for
-cluster time) where a previous cookie can be used for and to not
-require the server secret to be updated when it is shared by a
-cluster of servers.  In particular the time of generation needed
-to be passed between servers via the client so that old cookie can
-be rejected.
-
-The option structure is:
-
-	client cookie (64 bits)
-	server cookie (128 bits) broken up into:
-		- nonce (32 bits)
-		- time (32 bits)
-		- hash (64 bits)
-
-The initial requests just sends the client cookie.  If the response
-contains a matching client cookie the entire response is saved and
-sent on the next transaction.  A new server cookie is generated for
-every response.
-
-We are currently using EDNS Experimental code point 65001.  This is
-subject to change.
-
-We have three supported hash method.  AES, HMAC SHA 1 and HMAC SHA 256.
-A cluster of servers needs to choose one of them.
-
-AES
-	memset(input, 0, sizeof(input));
-        cp = isc_buffer_used(buf);
-        isc_buffer_putmem(buf, client->cookie, 8);
-        isc_buffer_putuint32(buf, nonce);
-        isc_buffer_putuint32(buf, when);
-        memmove(input, cp, 16);
-        isc_aes128_crypt(ns_g_server->secret, input, digest);
-        for (i = 0; i < 8; i++)
-                input[i] = digest[i] ^ digest[i + 8];
-        isc_netaddr_fromsockaddr(&netaddr, &client->peeraddr);
-        switch (netaddr.family) {
-        case AF_INET:
-                memmove(input + 8, (unsigned char *)&netaddr.type.in, 4);
-                memset(input + 12, 0, 4);
-                isc_aes128_crypt(ns_g_server->secret, input, digest);
-                break;
-        case AF_INET6:
-                memmove(input + 8, (unsigned char *)&netaddr.type.in6, 16);
-                isc_aes128_crypt(ns_g_server->secret, input, digest);
-                for (i = 0; i < 8; i++)
-                        input[i + 8] = digest[i] ^ digest[i + 8];
-                isc_aes128_crypt(ns_g_server->secret, input + 8, digest);
-                break;
-        }
-        for (i = 0; i < 8; i++)
-                digest[i] ^= digest[i + 8];
-        isc_buffer_putmem(buf, digest, 8);
-
-HMAC SHA1
-
-	hash = trunc(hmacsha1(secret, client|nonce|when|address), 8);
-
-HMAC SHA256
-
-	hash = trunc(hmacsha256(secret, client|nonce|when|address), 8);
-
-[1]
-INTERNET-DRAFT                                           Donald Eastlake
-Intended Status: Proposed Standard                                Huawei
-Expires: July 21, 2014                                  January 22, 2014
-
-
-                    Domain Name System (DNS) Cookies
-                 <draft-eastlake-dnsext-cookies-04.txt>
-