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# Cloud
## Download
characteristics bound to that device, entity or person.
- **Authorization**: Parses the network to allow access to some or all network
-functionality by providing rules and allowing access or denying access based
-on a subscriber's profile and services purchased.
+ functionality by providing rules and allowing access or denying access based
+ on a subscriber's profile and services purchased.
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## Transport
-For data transport, it is necessary to **encrypt data end-to-end**. To prevent **MITM** attacks,
-no third party should be able to interpret transported data. Another aspect
-is the data anonymization in order to protect the leakage of private information
-on the user or any other third party.
+For data transport, it is necessary to **encrypt data end-to-end**. To prevent
+**MITM** attacks, no third party should be able to interpret transported data.
+Another aspect is the data anonymization in order to protect the leakage of
+private information on the user or any other third party.
The use of standards such as **IPSec** provides "_private and secure
communications over IP networks, through the use of cryptographic security
- Integrity: A service that consists in ensuring that data has not been tampered
with accidentally or fraudulently.
- Replay Protection: A service that prevents attacks by re-sending a valid
- intercepted packet to the network for the same authorization.
- This service is provided by the presence of a sequence number.
+ intercepted packet to the network for the same authorization. This service is
+ provided by the presence of a sequence number.
- Key management: Mechanism for negotiating the length of encryption keys
between two **IPSec** elements and exchange of these keys.