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Editorial Team
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Asked: 2026-05-26T18:29:42+00:00

I’d like to leave the user the possibility to choice the encryption method, but

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I’d like to leave the user the possibility to choice the encryption method, but for now I implemented just AES with SHA1PRNG. With AES/CBC/PKCS5Padding it doesn’t work.
What does other encryption method work with android?
I have to encrypt data to store them in a db and then decrypt for show them.

The error returned:
java.security.NoSuchAlgorithmException: SecureRandom AES/CBC/PKCS5Padding implementation not found
here:

SecureRandom.getInstance( "AES/CBC/PKCS5Padding" );
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1 Answer

  1. Editorial Team

    Do you want to use a random number generator (which is what SecureRandom is for), or do you want to use an encryption algorithm (which is what AES is for)?

    If you want an encryption algorithm (and its implementation), use the javax.crypto.Cipher class, which should support your AES/CBC/PKCS5Padding algorithm.

    In principle you can use AES to build an RNG, too, but then you would not use CBC/PKCS5Padding, but something like ANSI X9.31. I don’t think this is implemented in any Java and/or Android API for SecureRandom.

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