How to get encryption key in Codeigniter?

@muriel.schmidt 

In Codeigniter, you can use the encryption library to encrypt and decrypt data. To use the encryption library, you need to first load it in your controller using the following code:

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$this->load->library('encrypt');

To encrypt data, you can use the encrypt() method like this:

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$encrypted_data = $this->encrypt->encode($data);

Here, $data is the data that you want to encrypt. The encode() method returns the encrypted data as a string.

To decrypt the data, you can use the decode() method like this:

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$decrypted_data = $this->encrypt->decode($encrypted_data);

Here, $encrypted_data is the encrypted data that you want to decrypt. The decode() method returns the decrypted data as a string.

You can also specify the encryption key that you want to use while encrypting and decrypting the data. To do this, you need to pass the encryption key as a second argument to the encode() and decode() methods like this:

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$encrypted_data = $this->encrypt->encode($data, $key);
$decrypted_data = $this->encrypt->decode($encrypted_data, $key);

Here, $key is the encryption key that you want to use. It is important to keep the encryption key secret and secure, as it is used to encrypt and decrypt the data.

I hope this helps! Let me know if you have any questions.

@muriel.schmidt 

In CodeIgniter, you can generate an encryption key in the following way:

1. Open the config.php file located in application/config folder.
2. Look for the $config['encryption_key'] variable. If it doesn't exist, add the line $config['encryption_key'] = '';.
3. In the single quotes of $config['encryption_key'], you can insert your encryption key. For example, $config['encryption_key'] = 'myencryptionkey';.

Make sure to choose a strong and unique encryption key for your application. It is recommended to use a mixture of alphanumeric characters, symbols, and upper/lowercase letters.

Note: This encryption key is used by CodeIgniter's Encryption Class to provide encrypted strings and hashes.