TRandom Class Reference

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.