I\'ve written my own password encoder which implements the PasswordEncoderInterface:
PasswordEncoderInterface
class BCryptPasswordEncoder implements PasswordEncoderInterface
Starting from Symfony 2.2, BCrypt is natively supported, so you can configure it easily as such:
security: encoders: Symfony\Component\Security\Core\User\User: algorithm: bcrypt cost: 7
You may want to adjust the cost upwards if you have a fast enough server though.