I am learning about aes-cbc and to simplify things we need two parameters for encryption and randomness (key and IV). IV is random at runtime and will be used to randomize the first cipherblock which makes sense. My question though is that how can someone decrypt the private key but knowning only...

SUBEXP is defined as the intersection of DTIME(2^n^c) over all c>0. The order of the Quadratic Sieve algorithm is O(exp((k+o(1))(logN)^1/2(loglogN)^1/2)). Doesn't this imply that the decision version of integer factorization is in SUBEXP? I ask because I can't find this result anywhere and I find...