Returns the name of the hash algorithm the {@code HashService} should use when computing the {@link Hash}, or
{@code null} if the default algorithm configuration of the {@code HashService} should be used. A non-null value
overrides the {@code HashService}'s configuration for a single request.
<p/>
Note that a {@code HashService} is free to ignore this value if it determines that the algorithm is not
sufficient to meet a desired level of security.
@return the name of the hash algorithm the {@code HashService} should use when computing the {@link Hash}, or
{@code null} if the default algorithm configuration of the {@code HashService} should be used.
Returns the name of the hash algorithm the {@code HashService} should use when computing the {@link Hash}, or {@code null} if the default algorithm configuration of the {@code HashService} should be used. A non-null value overrides the {@code HashService}'s configuration for a single request. <p/> Note that a {@code HashService} is free to ignore this value if it determines that the algorithm is not sufficient to meet a desired level of security.
@return the name of the hash algorithm the {@code HashService} should use when computing the {@link Hash}, or {@code null} if the default algorithm configuration of the {@code HashService} should be used.