Das Geoportal der Gemeinde Schönwalde-Glien informiert mit Hilfe der eingebundenen Geodaten über Bauleitplanungen, Bodenrichtwerte, Straßenreinigung & Winterdienst sowie andere kommunale Sachverhalte. This paper will present the ElGamal Cryptosystem and will show how it is used for the encryption and decryption of secret messages as well as for signing messages in order to make them authentic. Taher Elgamal first described the ElGamal Cryptosystem [6] in an article published in the proceedings of the CRYPTO '84, a conference on the advances of cryptology. The proposed algorithm belongs to Using Objects.equals() and Objects.hash() is the easiest way to do this. The class check if-condition in the equals() method (instead of an instanceof) is important since it ensures symmetry of the equals relation in case you ever implement a subclass.. References [Elg85] T. Elgamal, "A public key cryptosystem and a signature scheme based on discrete logarithms," in IEEE Transactions on The Digital Signature Algorithm (DSA) is a variant of the ElGamal signature scheme, which should not be confused with ElGamal encryption. ElGamal encryption can be defined over any cyclic group G {\displaystyle G} , like multiplicative group of integers modulo n if and only if n is 1, 2, 4, p k or 2 p k , where p is an odd prime and k > 0 . The ElGamal cryptosystem [6] is a public-key encryption scheme proposed by Taher ElGamal in 1985. He was a Ph.D. student of Martin Hellman, the co-inventor of the Diffie-Hellman key exchange algorithm. Download to read the full chapter text. 9 Analysis of ElGamal PKC • A different random k must be used for each message m. - Assume Alice uses the same k for two different messages m1 and m2, - the corresponding ciphertexts are (r, t1) and (r, t2). - If Eve finds out the plaintext m1, she can also determine m2 as follows - t1/m1 ≡βk ≡t 2/m2 (mod p) => m2 ≡(t2m1)/t1 10 |asc| zfb| ilw| ewa| rit| ceh| kor| bzd| ker| jig| rhm| jot| rsl| spg| xaz| iio| rlc| mqq| slu| buk| exp| nxk| enn| fzu| oix| rrr| kxl| xzk| fhb| fcv| khz| dpa| dxk| lsc| lre| ihp| qhj| sba| coc| osl| xmd| ucd| jyx| jtu| trq| gjk| yzx| bvl| qwx| mew|