Velciu Veronica-Mihaela - AAC

Nowadays, security becomes a great concern, as the devices start to process more and more sensitive data, leading to an increased number of attacks. The nodes in an wireless sensors network usually collect environment-related information and then send the data to a gateway, in order to be processed. There might be cases when the collected information leaks sensitive user data, so encrypting the communication would be a good practice is this cases. This project proposes and implements a method of securing the radio communication using symmetric cryptography on Sparrow v4 nodes.

The security module (AES) is characterized by:

• Hardware accelerated encryption and decryption;
• Compatible with AES-128 standard (128 bit key and data block size);
• ECB (encryption/decryption) mode and CBC (encryption) mode support;
• Stand-alone operation, independent of other blocks;
• Uses 16MHz crystal clock of the transceiver;