J2ME SecureRandom error

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J2ME SecureRandom error

Oyo man
Hi,

I have this exception when i do an 3des encryption :

java.lang.NoClassDefFoundError: java/security/SecureRandom: Cannot create
class in system package

I read in malling list :  jar file must be obfucscate with per example  
proguard to resolve this problem.
why proguard change something?

I tried obfucscate why proguard cldc_crypto.zip... zip's name change and
class's name change but i have in this way error in the build (method not
found).

how use correctly proguard?

thanks

best regards

gabriel

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