Java secretkey

// create new key
SecretKey secretKey = KeyGenerator.getInstance("AES").generateKey();
// get base64 encoded version of the key
String encodedKey = Base64.getEncoder().encodeToString(secretKey.getEncoded());

Source: stackoverflow.com

Java secretkey

// decode the base64 encoded string
byte[] decodedKey = Base64.getDecoder().decode(encodedKey);
// rebuild key using SecretKeySpec
SecretKey originalKey = new SecretKeySpec(decodedKey, 0, decodedKey.length, "AES");

Source: stackoverflow.com

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