Fragile Scream

I. Noise Source: Scream

Scream: A Software-Efficient Stream Cipher

We report on the design of Scream, a new software-efficient stream cipher, which was designedto be a “more secure SEAL”. Following SEAL, the design of Scream resembles in many ways ablock-cipher design. The new cipher is roughly as fast as SEAL, but we believe that it offers asignificantly higher security level. In the process of designing this cipher, we re-visit the SEALdesign...

Side Channel Risk Evaluation and Measurement (scream)

Perioperative nerve injury: a silent scream?

WELCH et al. add 112 well-documented adverse events from 380,680 patients to the third most commonly recognized cause of anesthesia litigation: Perioperative nerve injuries. This retrospective analysis from the University of Michigan collates three concurrent data sets (quality assurance, an internal closed-claims collection, and billing codes) to summarize the clinical experience with nerve in...

Look Up and Scream: Analytical Difficulties Resolved!

We solve a counting problem proposed by Balas and Connor [1] derived from a game called Look Up and Scream. Our solution applies to both variants of the game and is based on counting matchings of every size in the constraints graph of the game. We count such matchings directly in the unconstrained variant of the game and use a counting technique discovered by J. P. McSorley [2] for the constrai...