Browsing by Author "Zgureanu, Aureliu"

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    DERIVATION OF BOOLEAN FUNCTIONS BY THE BLOCKS METHOD
    (Valines SRL, 2014) Bulat, Mihai; Cataranciuc, Sergiu; Ciobanu, Iacob; Izbas, Vladimir; Zgureanu, Aureliu
    A method for calculating using blocks of the partial derivatives of the boolean function which are represented in algebraic form { a polynomial form, disjunctive normal form and conjunctive normal form is proposed. The method can be used success- fully for functions which depend on a large number of variables (tens and hundreds). This method can be applied to solve many problems from di®erent areas such as: elaborating of encryption system with variable keys, some problems from discrete mathematics (systems isomorphism problem, problem of determining of chromatic number in graphs ect.).
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    MATRICELE DE RELAŢII MULTI-ARE ŞI NUMERELE PRIME ÎN CRIPTAREA INFORMAŢIEI
    (CEP USM, 2012) Cataranciuc, Sergiu; Zgureanu, Aureliu
    Se propune un sistem simetric de criptare a informaţiei, numit Crypto 2. Acest sistem se bazează pe utilizarea numerelor prime mari şi pe dezvoltarea lor polinomială. Un rol deosebit revine matricelor multidimensionale, folositepentru reprezentarea mulţimilor de relaţii multi-are. Se descrie algoritmul de criptare/decriptare a informaţiei, Cripto 2,şi se demonstrează că acest algoritm are o complexitate liniară.