RSA

UC San Diego and Inria oracle attack cuts textbook RSA-2048 security by 22 bits

UC San Diego and Inria researchers report an attack, not yet peer reviewed, that cuts textbook RSA-2048 from 2^112 to 2^90 operations. It needs billions of queries against a raw RSA private key, so unmonitored HSMs and key-management services are the first place to look.