Criptografia com PHP
October 18, 2010
Fala Pessoal!
O PHP permite usar criptografiade 3 formas simples, sendo que em apenas uma delas existe “volta”, ou seja, a descriptografia da string.
1 – base64
Codigica uma string com base64. Para codificar, usa-se o método base64_encode() e para decodificar usa-se base64_decode().
echo(base64_encode("senha"));
echo(base64_decode("c2VuaGE="));
2 – MD5
Codifica uma string em um hash hexadecimal de 32 caracteres. Não há método para decodificação.
echo(md5("senha"));
3 – Crypt
Retorna uma string criptografada usando o algoritmo Unix Standard DES-based. Não há método para decodificação.
echo(crypt("senha"));
Das três formas, a mais seguraé MD5.
Bom, é isso.
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