Detection Framework Performance on a 1200 MHz Pentium III: JPHide speed: Approximately 12,000 words/s. 300 images with a 577,000 word dictionary take 10 days. Slow because of expensive key schedule computation. Outguess speed: Approximately 34,000 words/s. With a large dictionary finds a candidate for almost every image. JSteg-Shell speed: Approximately 53,000 words/s. Brute-force search of 40-bit key space possible.