SMC PROTOCOL FOR DISTRIBUTED K- ANONYMITY

Secure multiparty protocols have been proposed to enable non colluding parties to cooperate without a trusted server. Even though such protocols put off information exposé other than the objective function, they are quite costly in computation and communication. The high overhead motivates parties to estimate the utility that can be achieved as a result of the protocol beforehand. To avoid this issue we propose a look-ahead approach, specifically for secure multiparty protocols to achieve distributed k-anonymity, which helps parties to decide if the utility benefit from the protocol is within an acceptable range before initiating the protocol. The look-aheadoperation is highly localized and its accuracy depends on the amount of information the parties are willing toshare. Experimental results show the effectiveness of the proposed methods

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Not AvailableAging has been defined as the changes that occur in living organisms with the passage of time that lead to functional impairment and ultimately to death. Free radical-induced oxidative damage has long been thought to be the most important consequence of the aging process. In the present study, an attempt has been made to study the salubrious effects of dietary supplementation of chitosan on glutathione-dependent antioxidant defense system in young and aged rats. The dietary supplementation of chitosan significantly reduced the age-associated dyslipidemic abnormalities noted in the levels of total cholesterol, HDL-cholesterol, and LDL-cholesterol in plasma and heart tissue. Its administration significantly (P < 0.05) attenuated the oxidative stress in the heart tissue of aged rats through the counteraction of free radical formation by maintaining the enzymatic [glutathione peroxidase (GPx) and glutathione reductase (GR)] and non-enzymatic [reduced glutathione (GSH)] status at levels comparable to that of normal young rats. Our results conclude that dietary intake of chitosan restores the depleted myocardial antioxidant status and suggest that it could be an effective therapeutic agent in treatment of age-associated disorders where hypercholesterolemia and oxidative stress are the major causative factors.Not Availabl

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Not AvailableOxidative stress-induced aberrations in fatty acid composition of central nervous system during progression of aging are known to alter homeostatic processes of the whole organism. Antioxidants that accumulate in brain and neural tissue are potential candidates for prevention or treatment of disorders involving oxidative damage during disease progression. In the present study, an attempt was made to examine the antioxidant effect of squalene against n-3 polyunsaturated fatty acids (PUFA)-mediated oxidative stress in young and aged rats with respect to the changes in lipid peroxidation, enzymatic and non-enzymatic antioxidant status. Dietary co-intake of squalene significantly attenuated n-3 PUFA mediated oxidative stress in different regions of brain tissue of young and aged rats and maintained the cerebral antioxidant status at near normalcy. Though per se dietary supplementation of n-3 PUFA significantly elevated the enzymic and non-enzymic antioxidant levels in young rats, it diminished the antioxidant profiles in aged brain striatum, cortex and hippocampus regions. The results of the present study indicated that the combined dietary supplementation of squalene and n-3 PUFA might be a viable therapeutic strategy to ameliorate age associated oxidative stress in brain tissue.Not Availabl

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Not AvailableDespite considerable advances in diagnosis and management over the last three decades, acute myocardial infarction continues to be a major public health problem. It is predicted that ischemic heart diseases will constitute the major disease-burden worldwide in the year 2020. In the present study, an attempt has been made to examine the effects of dietary chitosan supplementation on lipid peroxidation and cardiac antioxidant defense system in isoprenaline- induced myocardial infarction in rats, an animal model of myocardial infarction in man. Dietary chitosan intake significantly attenuated the isoprenaline- induced lipid peroxidation and maintained the level of reduced glutathione at near normal. Its administration demonstrated an antioxidant effect by maintaining the activities of myocardial glutathione dependent antioxidant enzymes (glutathione peroxidase and glutathione - S - transferase) and antiperoxidative enzymes (superoxide dismutase and catalase) at levels comparable to that of controls. The results of the present study indicate that the salubrious effects of dietary supplementation of chitosan is probably related to a counteraction of free radicals and/or to normal maintenance of the activities of free radical enzymes and the level of GSH, which protect myocardial membrane against oxidative damage by decreasing lipid peroxidation.Not Availabl

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Not AvailableOxidative stress-induced aberrations in fatty acid composition of central nervous system during progression of aging are known to alter homeostatic processes of the whole organism. Antioxidants that accumulate in brain and neural tissue are potential candidates for prevention or treatment of disorders involving oxidative damage during disease progression. In the present study, an attempt was made to examine the antioxidant effect of squalene against n-3 polyunsaturated fatty acids (PUFA)-mediated oxidative stress in young and aged rats with respect to the changes in lipid peroxidation, enzymatic and non-enzymatic antioxidant status. Dietary co-intake of squalene significantly attenuated n-3 PUFA mediated oxidative stress in different regions of brain tissue of young and aged rats and maintained the cerebral antioxidant status at near normalcy. Though per se dietary supplementation of n-3 PUFA significantly elevated the enzymic and non-enzymic antioxidant levels in young rats, it diminished the antioxidant profiles in aged brain striatum, cortex and hippocampus regions. The results of the present study indicated that the combined dietary supplementation of squalene and n-3 PUFA might be a viable therapeutic strategy to ameliorate ageassociated oxidative stress in brain tissueNot Availabl

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Not AvailableAging has been defined as the changes that occur in living organisms with the passage of time that lead to functional impairment and ultimately to death. Free radical induced oxidative damage has long been thought to be the present study, an attempt has been made to study the salubrious effects of dietary supplementation of chitosan significantly reduced the age-associated dyslipidemic abnormalities noted in the levels of total cholesterol, and LDL-cholesterol in plasma and heart tissue. its administration significantly (P<0.05) attenuated the oxidative stress in the heart tissue of aged rats through the enzymatic glutathione peroxidase (GPx) and glutathione (GSH) status at levels comparable to that of normal young rats. our results conclude that dietary intake of chitosan restores the depleted myocardial antioxidant status and suggest that it could be an effective therapeutic agent in treatment of age-associated disorders where hypercholesterolemia and oxidative stress are the major causative factors.Not Availabl