Download An Introduction to Mathematical Cryptography (2nd Edition) by Joseph H. Silverman, Jeffrey Hoffstein, Jill Pipher PDF

By Joseph H. Silverman, Jeffrey Hoffstein, Jill Pipher

This self-contained advent to trendy cryptography emphasizes the math in the back of the idea of public key cryptosystems and electronic signature schemes. The e-book makes a speciality of those key themes whereas constructing the mathematical instruments wanted for the development and protection research of various cryptosystems. purely simple linear algebra is needed of the reader; suggestions from algebra, quantity conception, and likelihood are brought and constructed as required. this article offers an awesome creation for arithmetic and laptop technology scholars to the mathematical foundations of recent cryptography. The ebook contains an intensive bibliography and index; supplementary fabrics can be found online.

The e-book covers numerous themes which are thought of principal to mathematical cryptography. Key subject matters include:

* classical cryptographic buildings, reminiscent of Diffie–Hellmann key trade, discrete logarithm-based cryptosystems, the RSA cryptosystem, and electronic signatures;

* basic mathematical instruments for cryptography, together with primality checking out, factorization algorithms, likelihood conception, info conception, and collision algorithms;

* an in-depth therapy of vital cryptographic concepts, corresponding to elliptic curves, elliptic curve and pairing-based cryptography, lattices, lattice-based cryptography, and the NTRU cryptosystem.

The moment variation of An advent to Mathematical Cryptography encompasses a major revision of the fabric on electronic signatures, together with an past creation to RSA, Elgamal, and DSA signatures, and new fabric on lattice-based signatures and rejection sampling. Many sections were rewritten or extended for readability, specifically within the chapters on details conception, elliptic curves, and lattices, and the bankruptcy of extra subject matters has been accelerated to incorporate sections on electronic money and homomorphic encryption. a number of new routines were integrated.

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Extra info for An Introduction to Mathematical Cryptography (2nd Edition) (Undergraduate Texts in Mathematics)

Example text

2) However, as noted earlier, we eventually get to an ri that is zero, say rt+1 = 0. Then rt−1 = rt · qt , so gcd(rt−1 , rt ) = gcd(rt · qt , rt ) = rt . But Eq. , to gcd(a, b), which completes the proof that the last nonzero remainder in the Euclidean algorithm is equal to the greatest common divisor of a and b. It remains to estimate the efficiency of the algorithm. We noted above that since the ri values are strictly decreasing, the algorithm terminates, and indeed since r1 = b, it certainly terminates in at most b steps.

An Introduction to Cryptography We let a = 2024 and b = 748, so the first line says that 528 = a − 2b. We substitute this into the second line to get b = (a − 2b) · 1 + 220, 220 = −a + 3b. so We next substitute the expressions 528 = a − 2b and 220 = −a + 3b into the third line to get a − 2b = (−a + 3b) · 2 + 88, so 88 = 3a − 8b. Finally, we substitute the expressions 220 = −a + 3b and 88 = 3a − 8b into the penultimate line to get −a + 3b = (3a − 8b) · 2 + 44, so 44 = −7a + 19b. In other words, −7 · 2024 + 19 · 748 = 44 = gcd(2024, 748), so we have found a way to write gcd(a, b) as a linear combination of a and b using integer coefficients.

33. The simple substitution cipher does not have Property 4, since even a single plaintext/ciphertext pair (m, c) reveals most of the encryption table. Similarly, the Vigen`ere cipher discussed in Sect. 2 has the property that a plaintext/ciphertext pair immediately reveals the keyword used for encryption. Thus both simple substitution and Vigen`ere ciphers are vulnerable to known plaintext attacks. 43 for a further example. ” We defer a formal discussion of this profound question to Sect. 7; see also Sects.

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