girino on Nostr: Yet another improvement to mitigate replay attacks: To mitigate replay attacks, it's ...
Yet another improvement to mitigate replay attacks:
To mitigate replay attacks, it's advisable to assign short expiration times to all gift-wrapped events. According to NIP-40, the `expiration` tag allows events to specify a Unix timestamp after which they should be considered expired and potentially deleted by relays. By setting this expiration to less than 5 minutes, intercepted events become invalid shortly after creation, reducing the risk of replay attacks.
**Implementation Steps:**
1. **Assign Expiration Tag:** When creating a gift-wrapped event, include the `expiration` tag with a timestamp set to the current time plus a few minutes (e.g., 5 minutes).
```json
"tags": [
["expiration", "1600000000"]
]
```
2. **Relay Compliance:** Ensure that relays adhere to NIP-40 by dropping expired events and not forwarding them to clients.
Implementing short-lived expiration times enhances security by ensuring that even if an event is intercepted, its usability window is minimal, thereby mitigating the potential for replay attacks.
To mitigate replay attacks, it's advisable to assign short expiration times to all gift-wrapped events. According to NIP-40, the `expiration` tag allows events to specify a Unix timestamp after which they should be considered expired and potentially deleted by relays. By setting this expiration to less than 5 minutes, intercepted events become invalid shortly after creation, reducing the risk of replay attacks.
**Implementation Steps:**
1. **Assign Expiration Tag:** When creating a gift-wrapped event, include the `expiration` tag with a timestamp set to the current time plus a few minutes (e.g., 5 minutes).
```json
"tags": [
["expiration", "1600000000"]
]
```
2. **Relay Compliance:** Ensure that relays adhere to NIP-40 by dropping expired events and not forwarding them to clients.
Implementing short-lived expiration times enhances security by ensuring that even if an event is intercepted, its usability window is minimal, thereby mitigating the potential for replay attacks.