Amplifying side channels through performance degradation
| Autor: | Yuval Yarom, Katrina Falkner, Thomas Allan, Billy Bob Brumley, Joop van de Pol |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Exploit
Computer science business.industry Elliptic Curve Digital Signature Algorithm Information quality 02 engineering and technology Adversary Computer security computer.software_genre 020202 computer hardware & architecture Public-key cryptography Digital Signature Algorithm 0202 electrical engineering electronic engineering information engineering 020201 artificial intelligence & image processing business Protocol (object-oriented programming) computer TRACE (psycholinguistics) |
| Zdroj: | ACSAC |
| DOI: | 10.1145/2991079.2991084 |
| Popis: | Interference between processes executing on shared hardware can be used to mount performance-degradation attacks. However, in most cases, such attacks offer little benefit for the adversary. In this paper, we demonstrate that software-based performance-degradation attacks can be used to amplify side-channel leaks, enabling the adversary to increase both the amount and the quality of information captured. We identify a new information leak in the OpenSSL implementation of the ECDSA digital signature algorithm, albeit seemingly unexploitable due to the limited granularity of previous trace procurement techniques. To overcome this imposing hurdle, we combine the information leak with a microarchitectural performance-degradation attack that can slow victims down by a factor of over 150. We demonstrate how this combination enables the amplification of a side-channel sufficiently to exploit this new information leak. Using the combined attack, an adversary can break a private key of the secp256k1 curve, used in the Bitcoin protocol, after observing only 6 signatures---a four-fold improvement over all previously described attacks. |
| Databáze: | OpenAIRE |
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