• Vincent Lyles

Stealing Keys from PCs Using a Radio: Cheap Electromagnetic Attacks on Windowed Exponentiation

Updated: Jul 29, 2020

Eran Tromer's team presented new side-channel attacks on RSA and ElGamal implementations that use sliding-window or fixed-window (m-ary) modular exponentiation. The attacks extract decryption keys using a very low measurement bandwidth (a frequency band of less than 100 kHz around a carrier under 2 MHz) even when attacking multi-GHz CPUs.

They demonstrated the attacks’ feasibility by extracting keys from GnuPG (unmodified ElGamal and non-blinded RSA), within seconds, using a nonintrusive measurement of electromagnetic emanations from laptop computers. The measurement equipment is cheap and compact, uses readily-available components (a Software Defined Radio USB dongle or a consumer-grade radio receiver), and can operate untethered while concealed, e.g., inside pita bread.

Full Article:

#electromagnetic #RSA #sidechanelattack

23 views0 comments

Recent Posts

See All

Pugged Code in a Post Quantum World

Lots has been said about how the World will change once successful quantum computers are part of the landscape. In the field of cryptography, algorithms which rely on using large primes will become v