Smart pointers. shared_ptr and normal pointer

Shared pointer can make our code more secure. shared_pointer is a kind of pointer that allow to others pointer share his container. And when no pointer points to a container, the garbage collector erase the container thus ensuring the reliable of the program in order to no consume the heap of the process.

If we use the next code, the above behaviour.

The follow code show the common error, creating new pointers and not erase the container.


If we compile and execute this two codes, we obtain the next statistical result:

Polinomios interpoladores y el esquema de Shamir

Descargar el archivo completo: Polinomios Interpoladores y el esquema de Shamir

La interpolacion polinómica se utiliza, entre otras cosas, para la aproximacion de funciones, pero existe otra aplicacion para criptografia, entre otras, para compartir secretos, en este articulo se detalla el algoritmo que define "el esquema de Shamir" y se brinda el codigo escrito para PHP .

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Miller-Rabin primality test

From Wikipedia, the free encyclopedia

The Miller-Rabin primality test or Rabin-Miller primality test is a primality test: an algorithm which determines whether a given number is prime, similar to the Fermat primality test and the Solovay-Strassen primality test. Its original version, due to Gary L. Miller, is deterministic, but it relies on the unproven generalized Riemann hypothesis; Michael O. Rabinprobabilistic algorithm.

• Enlace a WikiPedia: Miller-Rabin primality test

• Documentacion adicional http://primes.utm.edu/