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Text messages cannot be decoded without the use of ciphers or encryption methods. If a text message is sent in plain, unencrypted text, it can easily be intercepted and read by anyone with access to the message transmission. However, if the message is encrypted using standard encryption protocols such as AES, RSA, or Blowfish, it is significantly more difficult to decode the message without the use of specialized software, tools, or algorithms. Ultimately, the most effective way to keep text messages secure is to use robust encryption techniques for sensitive messages, such as end-to-end encryption, two-factor authentication, or using secure messaging apps.