Recently, numerous physical attacks have been demonstrated against lattice-based schemes, often exploiting their unique properties such as the reliance on Gaussian distributions, rejection sampling and FFT-based polynomial multiplication. As the call for concrete implementations and deployment of postquantum cryptography becomes more pressing, protecting against those attacks is an important problem. However, few countermeasures have been proposed so far. In particular, masking has been applied to the decryption procedure of some lattice-based encryption schemes, but the much more difficult case of signatures (which are highly non-linear and typically involve randomness) has not been considered until now. In this paper, we describe the first masked implementation of a lattice-based signature scheme. Since masking Gaussian sampling and other procedures involving contrived probability distribution would be prohibitively inefficient, we focus on the GLP scheme of Güneysu, Lyubashevsky and MedicGLP Support Pöppelmann (CHES 2012). We show how to provably mask it in the Ishai–Sahai–Wagner model (CRYPTO 2003) at any order in a relatively efficient manner, using extensions of the techniques of Coron et al for converting between arithmetic and Boolean masking. Our proof relies on a mild generalization of probing security that supports the notion of public outputs. We also provide a proof-of-concept implementation to assess the efficiency of the proposed countermeasure.
Science continues to prove that the old adage “you are what you eat” is profoundly true. This is because you have trillions of microorganisms living in your gut, which are directly responsible for nearly every aspect of your health. These microbes make up what’s called your “gut microbiota.” They are especially influential in determining your likelihood of gaining excessive lifestyle weight support, becoming obese, and developing obesity-related diseases like diabetes, heart disease, and premature death. The gut microbiome (the expressed genes of your gut microbiota) plays a major role in your metabolism through energy production, storage, and expenditure. So, it’s no surprise that science has found a strong connection between gut microbiome imbalance and metabolic syndrome. Yikes! If you have the wrong mix of microbes, it could be making it tough for you to get your health on track! Did you know: lifestyle weight support Scientists can actually look at your gut microbiome composition and tell with 90% accuracy if you are obese or lean. That’s pretty impressive, isn’t it?
1. Unable to lose weight and keep it off? 2. Struggling to fight cravings? 3. Sick of starving yourself for weight loss? 4. Baffled as to why no diet seems to really work for you? Depending on the composition of your gut microbiome, your microbes can either boost your health or weigh you down (figuratively and literally). The good news is this: You have control over these little guys with every bite you eat. Diet has the power to change the landscape of your gut microbiome. So, if you’ve tried multiple diets and can’t seem to get the results you want, it’s time to look into your gut microbiome.Will You Lose Weight Naturally on an Individualized Diet? If you’ve been struggling to lose weight and keep it off – it could be your gut microbiome. While Viome doesn’t guarantee weight loss, it has been an exciting result many of our customers have reported. “Fiona’s update day 37!
We know weight loss can be tough. Find out if your weight struggles are due to a gut microbiome imbalance with Viome – and let’s tip the scales in your favor. Your gut microbes actually digest much of your food for you. When your gut microbiota help digest your food, they turn it into nutrients, neurotransmitters, vitamins, hormones, and more. Through these metabolites, the composition of your gut microbiome influences nearly every metabolic activity. It’s accurate to think of your gut microbiome as an organ that’s part immune system and part energy regulator. If your gut microbiome is imbalanced, certain bacteria end up working to protect themselves from the harsh environment and are not able to help you. In the worst case scenario, you can have microbiota adding to your health problems, making it harder for you to get healthy and lose weight. Viome’s metatranscriptomic technology has allowed us identify microbial pathways and functions, specifically those that influence weight loss or gain.