Method for validating messages
A method of processing a notification that is broadcast by a source server is disclosed. The method includes: receiving, at the computing device, the notification, the notification containing a first message; storing the first message in a message store; determining that the first message is a repeated message of a previous message that was received at the computing device prior to receiving the notification; and associating a message counter value of the first message with the previous message and a message counter value associated with the previous message in the message store.
1. A method of processing, at a computing device, a notification that is broadcast by a source server, the method comprising:
receiving, at the computing device, the notification, the notification containing a first message;
storing the first message in a message store;
determining that the first message is a repeated message of a previous message that was received at the computing device prior to receiving the notification;
associating a message counter value of the first message with the previous message and a message counter value associated with the previous message in the message store; and
providing the first message and at least a portion of the previous message to a user of the computing device.
2. The method of claim 1 , wherein the providing comprises providing at least the first message, metadata for the first message, and metadata for the previous message to the user.
3. The method of claim 2 , wherein the metadata for the first and second messages include message time stamps.
4. The method of claim 1 , further comprising:
determining that the first message is a replay attack based on the message counter value of the first message, the message counter value of the previous message, and the previous message; and
discarding the first message.
5. The method of claim 1 , wherein determining that the first message is a replay attack comprises comparing the message counter value of the first message with the message counter value of the previous message.
6. The method of claim 1 , wherein storing the first message in the message store comprises storing the first message in association with the message counter value of the first message.
7. A computing device, comprising:
memory;
a processor coupled to the memory, the processor being configured to:
receive, from a server, a warning message;
store the received warning message in a data store;
determine that the received warning message is a repeated message of a previously received message;
associate a counter value of the received warning message with the previously received message and a counter value associated with the previously received message in the data store; and
provide the first message and at least a portion of the previous message to a user of the computing device.
8. The computing device of claim 7 , wherein the providing comprises providing at least the first message, metadata for the first message, and metadata for the previous message to the user.
9. The computing device of claim 8 , wherein the metadata for the first and second messages include message time stamps.
10. The computing device of claim 7 , wherein the processor is further configured to:
determine that the first message is a replay attack based on the message counter value of the first message, the message counter value of the previous message, and the previous message; and
discard the first message.
11. The computing device of claim 7 , wherein determining that the first message is a replay attack comprises comparing the message counter value of the first message with the message counter value of the previous message.
12. The computing device of claim 7 , wherein storing the first message in the message store comprises storing the first message in association with the message counter value of the first message.
13. A non-transitory machine-readable medium comprising instructions that, when executed on a processor of a computing device, enable the computing device to:
receive, at the computing device, the notification, the notification containing a first message;
store the first message in a message store;
determine that the first message is a repeated message of a previous message that was received at the computing device prior to receiving the notification;
associate a message counter value of the first message with the previous message and a message counter value associated with the previous message in the message store; and
provide the first message and at least a portion of the previous message to a user of the computing device.