Encryption is the process of transforming information (called plaintext) into an unreadable form (called ciphertext) using an encryption algorithm combined with a parameter (called an encryption key). Only those who possess the decryption key can reverse the process and recover the original plaintext. Conceptual questions about encryption may get better answers on crypto.stackexchange.com.
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Encrypting strings in Android: Let’s make better mistakes
If you do a web search for “encrypting Strings in Android”, you’ll find a lot of example code, and they all look pretty similar. They definitely input a String and output gibberish that looks like encrypted text, but they are often incorrect. Crypto is tricky: it’s hard to tell that the gibberish that’s being printed is not good crypto, and it’s hard to tell that the code example you picked up from Stack Overflow has serious flaws.
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