CakePHP 3.5中Security::encrypt加密测试的特殊字符疑问

Absolutely, this is totally normal behavior for CakePHP's Security::encrypt() method! Let me break down why you're seeing those odd symbols:

• First off, Security::encrypt() in CakePHP 3.5 uses AES encryption under the hood, and the raw output of this encryption is binary data, not human-readable text. When you log this binary data directly, your system tries to interpret each byte as a character—any bytes that don't map to standard ASCII characters end up showing as those weird symbols you see (like ΊCdΔA€Νίύι).
• The critical thing here is that your decryption worked perfectly: you got back the original 123 value. That means the encryption process was fully successful, and those special characters are just a side effect of how binary data gets displayed as plain text.

If you need to store or transmit this encrypted data (say, in a database or via an API) and want to avoid unreadable characters, a common fix is to encode the binary result as a Base64 string. Here's how you can adjust your code:

$key = '111111111111111111111111111111111';
$enc = Security::encrypt('123', $key);
// Convert binary to Base64 for clean storage/transmission
$encBase64 = base64_encode($enc);
Log::write(LOG_DEBUG, "Encrypt (Base64) $key: $encBase64");

// Decode Base64 before decrypting
$dec = Security::decrypt(base64_decode($encBase64), $key);
Log::write(LOG_DEBUG, "Decrypt $key: $dec");

This will give you a plain ASCII string for the encrypted value, while still letting you decrypt it back to the original data without any issues.

内容的提问来源于stack exchange，提问作者Harris