In this work, we present a CC-MM algorithm for large matrices. The algorithm consists of plaintext matrix multiplications (PP-MM) and ci-phertext matrix transpose algorithms (C-MT). We …

In this work, we provide the first construction of a ciphertext-policy attribute-based en-cryption (CP-ABE) to address this problem, and give the first construction of such a scheme. In our …

Usually, the ciphertext alphabet is much larger than the plaintext alphabet and the size of f (a) is proportional to the frequency of occurrence of a in normal English.

In this work, we present a CC-MM algorithm for large matrices. The algorithm consists of plaintext matrix multiplications (PP-MM) and ciphertext matrix transpose algorithms (C-MT). We …

PPMM: plaintext-plaintext matrix multiplication PCMM: plaintext-ciphertext matrix multiplication CCMM: ciphertext-ciphertext matrix multiplication PCMMs and CCMMs with diverse …

These variants are denoted CBC-CS1, CBC-CS2, and CBC-CS3, where “CS” indicates “ciphertext stealing,” because when padding bits are needed in these variants, they are taken …

Chosen Plaintext attack: Get ciphertext for a given plaintext Get the (∆X, ∆Y) pairs, where ∆X is the difference in plaintext and ∆Y is the difference in ciphertext Some (∆X, ∆Y) pairs are more …