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Asked by HappyEngineer in Java Programming Language, Algorithms
I would like to create an encrypted cookie which contains a user id. In the past I've used encryption for a few things (passwords and credit card numbers) but have found that it is so incredibly easy to encrypt something insecurely due to bad defaults in the encryption api.
I would like a simple implementation of the following which has been verified by someone knowledgeable as actually being done securely. The defaults of whatever encryption api used should be set up properly to handle short strings (cookie strings aren't going to be very long and it's my understanding that some apis churn out weakly encrypted data if the input string is too short).
public static String encrypt(String str, String key);
public static String decrypt(String str, String key);
public static String generateKey();
As I recall I last used the bouncycastle encryption library through a standard java api, but I don't recall what it was.
20091111-EE-VQP-91 - Hierarchy / EE_QW_EXPERT_20070906
