Home Computer Science Hardware Security and Trust: Design and Deployment of Integrated Circuits in a Threatened Environment
Schedule of Your Work
We reccommend you to proceed according to the following steps:
In folder Analysis you will find two sets of measurements. One set is for known key 00 11 22 33 44 55 66 77 88 99 aa bb cc dd ee ff, the other set is for unknown key.
18.104.22.168 Training Set for Known Key 00 11 22 33 44 55 66 77 88 99 Aa Bb Cc Dd Ee Ff
To implement and debug your program/script, we provide testing traces of 200 AES encryptions (AES 128, with 10 rounds). We encrypted 200 plaintexts (file plaintext-00112233445566778899aabbccddeeff.txt), obtaining 200 ciphertexts (file ciphertext-00112233445566778899aabbccddeeff.txt. During encryptions we measured power traces (traces-00112233445566778899aabbccddeeff.bin). Each trace has a length of 370 000 samples (in this case). Each sample is represented by 8 bit unsigned value (i.e., the length of the file is 370 000 bytes * 200 traces = 74 MB).
If your program/script is correct, then you should reveal the key 00 11 22 33 44 55 66 77 88 99 AA BB CC DD EE FF.
22.214.171.124 Training Set for Unknown Key
If you are successful with the set above, you may try to recover the unknown key. We made 150 AES encryptions (AES 128, with 10 rounds).
Files plaintext-unknown_key.txt and ciphertext-unknown_key.txt contain plaintexts and corresponding ciphertexts, which were produced by an AES encryption with an unknown key. File traces-unknown_key.bin stores power traces recorded during encryptions of above plaintexts. File traceLenght-unknown_key.txt contains information on trace length, i.e., 550000 samples in this case.
You can easily check whether you found correct key. Just take any plaintext from the file plaintext-unknown_key.txt, encrypt it with the key you determined by the analysis, and compare the resulting ciphertext with a corresponding ciphertext from the file ciphertext-unknown_key.txt. If the ciphertexts match, you found the correct key.
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