Posts tagged: CUDA

Testing of MS Office password recovery programs with GPU support

Password recovery software developers actively introduce general purpose computations on GPU (GPGPU) into their products. Today I will test three products, which already have support of NVIDIA and/or ATI cards for password recovery of Microsoft Office files. Read more »

About CPU and GPU usage for password recovery

Ivan Golubev, the author of very fast programs ighashgpu and igrargpu, which were mentioned in my block, wrote an interesting article “About CPU and GPU usage for password recovery“.

MS Office 40-bit key searching on GPU

In one of the first notes in this blog I have already spoken about the encryption details used in different versions of Microsoft Office. Certainly it was interesting for me whether it is possible to apply technology of general-purpose computations on video cards (CUDA) to speed up the process of key recovery for MS Office. The most important bottleneck was the RC4 algorithm which is basic in almost all Office versions encryption. In the Internet I saw responses that RC4 implementation on CUDA was almost more slowly than on CPU which meant that RC4 algorithm did not fit for optimized GPU implementation. Read more »

RAR Password Recovery on GPU

Recently at least two RAR password recovery programs with GPU acceleration were released. The first was new 3.2 version of cRARk supporting CUDA technology. The second was a new igrargpu program written by Ivan Golubev. Read more »