KITE » History » Version 9
Zhongda Xia, 12/02/2020 12:22 AM
1 | 1 | Davide Pesavento | # KITE |
---|---|---|---|
2 | |||
3 | 2 | Zhongda Xia | The **KITE protocol** allows building forwarding paths for prefixes using "authenticated" Interest-Data exchanges between a mobile producer (MP) and a trusted Rendezvous Server (RV). |
4 | 1 | Davide Pesavento | |
5 | 9 | Zhongda Xia | An MP sends a **KITE request** (a signed Interest), which is forwarded to the RV because the RV announces a prefix of the name. The KITE request leaves traces in the stateful forwarding plane (PIT entries), constructing a forwarding path for Data to be forwarded to the MP. The RV will verify the information carried in the KITE request (primarily the signature, and thus the term "authenticated Interest-Data exchange"), and respond with a **KITE acknowledgment**, a Data packet, for legitimate KITE requests. The KITE acknowledgment sent by the RV will trigger intermediate forwarders to save the reversed forwarding path for Data as Interest forwarding information, for a prefix specified by the name of the Interest-Data exchange. |
6 | 1 | Davide Pesavento | |
7 | 7 | Zhongda Xia | ## KITE Request |
8 | 1 | Davide Pesavento | |
9 | 9 | Zhongda Xia | A **KITE request** is essentially a signed Interest as specified in the v0.3 packet format (https://named-data.net/doc/NDN-packet-spec/current/signed-interest.html) that carries both a timestamp and a nonce for replay-attack prevention. A KITE request is signed and sent by an MP to be verified by an RV, |
10 | 1 | Davide Pesavento | |
11 | 2 | Zhongda Xia | An Interest packet that satisfies the following requirements is a KITE request: |
12 | |||
13 | * Conforms to signed Interest specifications. |
||
14 | 9 | Zhongda Xia | * With the trailing ApplicationParameters digest removed, the remaining leading part of the name conforms to KITE request name specifications (see below). |
15 | * The ApplicationParameters contains the expiration period for the forwarding path (optional), which is a TLV block of Type "tlv::nfd::ExpirationPeriod". |
||
16 | 2 | Zhongda Xia | |
17 | 1 | Davide Pesavento | KITE request name specifications: |
18 | 2 | Zhongda Xia | |
19 | 1 | Davide Pesavento | * Starts with an **RV prefix**, i.e., a prefix announced by an RV. |
20 | 2 | Zhongda Xia | * Followed by a **"32=KITE"** keyword name component. |
21 | 9 | Zhongda Xia | * Ends with a **producer suffix**, i.e., one or more arbitrary name components. The concatenation of an RV prefix and a producer suffix in the same KITE request name is the **producer prefix** specified in this name. The forwarding path to be set up is for the producer prefix. |
22 | 6 | Zhongda Xia | |
23 | 9 | Zhongda Xia | For example, for RV prefix = /RV, producer suffix = /Alice, thus making producer prefix /RV/Alice, the full name of the corresponding KITE request should be: |
24 | 6 | Zhongda Xia | |
25 | ~~~ |
||
26 | 9 | Zhongda Xia | /RV/32=KITE/Alice/<parameter digest> |
27 | 6 | Zhongda Xia | |
28 | ~~~ |
||
29 | |||
30 | 7 | Zhongda Xia | ## KITE Acknowledgment |
31 | 2 | Zhongda Xia | |
32 | 9 | Zhongda Xia | A **KITE acknowledgment** is a Data packet sent by the RV for an Interest (a **KITE request**) that passes verification. A KITE request that passes the verification is supposed to be sent by the owner of the specified producer prefix for which the forwarding path is set up. |
33 | 2 | Zhongda Xia | |
34 | A Data packet that satisfies the following requirements is a KITE acknowledgement (note that a KITE acknowledgment is always generated in response to a KITE request): |
||
35 | |||
36 | 1 | Davide Pesavento | * Has the same name with a KITE request. |
37 | * ContentType is 6 (KITE Acknowledgment). |
||
38 | 6 | Zhongda Xia | * Carry a prefix announcement object as payload, and the "announced prefix" indicated by the PA object must be the same as the producer prefix specified in the name (refer to KITE request specifications for determining the producer prefix). |
39 | 1 | Davide Pesavento | * The payload only consists of a prefix announcement object in data form, no other content. |