* buffer with the generated pseudo-random data up to the

	 * current length, discarding any current contents. The 

	 * implementations should leave with KErrNotSecure when 

	 * the generated random data is not secure enough. 

	 * @param aDest The buffer to fill with random data

	 * @leave KErrNotSecure Random data generated is not 

	 *        secure enough for crytographic operations

	 *        otherwise, leaves with any other system wide error code.

 * Sets a pseudo-random number generator implementation to use for this thread.

 * @param aRNG The pseudo-random number generator to use.

 * Sets a pseudo-random number generator implementation to use

 * @param aRNG The pseudo-random number generator to use.

 * Generates pseudo-random data.

 * Fills the provided buffer up to its current length,

 * discarding any data that it may currently contain.

 * @leave KErrNotSecure The random data generated is  

 *        not secure enough for cryptographic operations

 *        otherwise, leaves with any other system wide error codes. 

class CRandomShim;

 * This default pseudo-random number generator uses system state 

 * to generate entropy for the generation of random numbers.

	 * Constructs a new pseudo-random number generator.

	 * Constructs a new pseudo-random number generator,

	 * Implements the contract as specified in the base class,  CRandom, filling the buffer

	 * supplied with random data  up to its current length, discarding its current content.

	 * It will leave with KErrNotSecure when the generated random data is not secure enough.

	 * @leave KErrNotSecure The generated random data is not secure enough for cryptographic operations 

	 *        otherwise, leaves with any other system wide error codes.

	 *        

	~CSystemRandom();

	void ConstructL();

	CRandomShim *iShim;

 * The user interface to the random number generator.

	 * Fills the provided buffer with pseudo-random data up to its current length, 

	 * discarding any current content.

	 *

	 * This method will not return secure random numbers for some time after the phone boot-up. Because,

	 * pseudo-random number generator will take some time to attain a secure state by collecting enough 

	 * entropy samples after the boot-up. Till that time, the pseudo-random numbers generated may not be

	 * cryptographically secure and there is no way to get to know about it with this API. 

	 * So, if explcit notification on the strength of the random numbers is necessary, use TRandom::SecureRandomL.

	/**	

	 * Fills the provided buffer with pseudo-random data up to its current length,

	 * discarding any current content.

	 *

	 * This method will not return secure random numbers for some time after the phone boot-up. Because,

     * pseudo-random number generator will take some time to attain a secure state by collecting enough 

     * entropy samples after the boot-up. Till that time, the pseudo-random numbers generated may not be

     * cryptographically secure and there is no way to get to know about it with this API. 

     * So, if explcit notification on the strength of the random numbers is necessary, use TRandom::SecureRandomL.

	/**

	 * 

	 * Fills the provided buffer with the pseudo-random data up to its current length, discarding any current

	 * content of the descriptor. When this method returns normally (with out leave), the system state is secure

	 * and hence the random numbers generated are cryptographically secure as well. When this method leaves with

	 * the error code KErrNotSecure, the system internal state is not secure and hence the random numbers too.

	 * 

	 * Though this method leaves when the system internal state is not secure, still the descriptor will be filled 

	 * with pseudo-random bytes. This random data may or may not be secure enough. Recommended to treat these numbers 

	 * as not secure.

	 *

	 * @param aDestination The buffer in which to write the random data.

	 * @leave KErrNotSecure The generated random numbers is not secure enough for cryptographic operations.

	 *        Otherwise, leaves with some other system wide error codes.

	 *

	 */

	IMPORT_C static void SecureRandomL(TDes8& aDestination);

	 * Fills the provided buffer with pseudo-random data up to its

	 * Opens a new session with the random number generator.