An Introduction to Mathematical Cryptography (2nd Edition) - download pdf or read online

By Joseph H. Silverman, Jeffrey Hoffstein, Jill Pipher

ISBN-10: 1493917110

ISBN-13: 9781493917112

This self-contained advent to fashionable cryptography emphasizes the maths in the back of the idea of public key cryptosystems and electronic signature schemes. The e-book makes a speciality of those key issues whereas constructing the mathematical instruments wanted for the development and defense research of various cryptosystems. merely simple linear algebra is needed of the reader; innovations from algebra, quantity concept, and likelihood are brought and built as required. this article presents an incredible advent for arithmetic and machine technology scholars to the mathematical foundations of recent cryptography. The booklet comprises an intensive bibliography and index; supplementary fabrics can be found online.

The ebook covers numerous subject matters which are thought of valuable to mathematical cryptography. Key subject matters include:

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

* primary mathematical instruments for cryptography, together with primality trying out, factorization algorithms, chance concept, details thought, and collision algorithms;

* an in-depth remedy of significant cryptographic thoughts, akin to elliptic curves, elliptic curve and pairing-based cryptography, lattices, lattice-based cryptography, and the NTRU cryptosystem.

The moment version of An creation to Mathematical Cryptography features 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 accelerated for readability, particularly within the chapters on info conception, elliptic curves, and lattices, and the bankruptcy of extra themes has been extended to incorporate sections on electronic money and homomorphic encryption. quite a few new workouts were incorporated.

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

Example text

4. Given one or more pairs of plaintexts and their corresponding ciphertexts, (m1 , c1 ), (m2 , c2 ), . . , (mn , cn ), it must be very difficult to decrypt any ciphertext c that is not in the given list without knowing k. This property is called security against a known plaintext attack. Even better is to achieve security while allowing the attacker to choose the known plaintexts. 5. For any list of plaintexts m1 , . . , mn ∈ M chosen by the adversary, even with knowledge of the corresponding ciphertexts ek (m1 ), .

So we only need to consider the case that p a. , (p − 1)a reduced modulo p. 8) There are p − 1 numbers in this list, and we claim that they are all different. To see why, take any two of them, say ja mod p and ka mod p, and suppose that they are the same. This means that ja ≡ ka (mod p), (j − k)a ≡ 0 and hence that (mod p). Thus p divides the product (j − k)a. 19 tells us that either p divides j − k or p divides a. However, we have assumed that p does not divide a, so we conclude that p divides j − k.

If Bk is too small, then Eve can check every number from 0 to 2Bk − 1 until she finds Alice and Bob’s key. More precisely, since Eve is assumed to know the decryption algorithm d (Kerckhoff’s principle), she takes each k ∈ K and uses it to compute dk (c). Assuming that Eve is able to distinguish between valid and invalid plaintexts, eventually she will recover the message. This attack is known as an exhaustive search attack (also sometimes referred to as a brute-force attack ), since Eve exhaustively searches through the key space.

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An Introduction to Mathematical Cryptography (2nd Edition) (Undergraduate Texts in Mathematics) by Joseph H. Silverman, Jeffrey Hoffstein, Jill Pipher


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