The answer is yes, but there are two key prerequisites: 1. The data itself is not encrypted. If the data sent by the handheld device is not encrypted, the data is transmitted in plain text during the wireless signal transmission process. As long as the attacker has the appropriate receiving equipment and technology, he can intercept the data. 2. The attacker needs to have the right physical conditions. The interception of wireless signals generally requires the attacker to be close enough to capture the wireless signal of the target device. For example, in scenarios where public Wi-Fi, Bluetooth or other wireless communication technologies are used, the attacker can use sniffing tools to obtain the data packets in transmission. It should be noted that: • In modern network environments, many wireless transmissions (such as using Wi-Fi and Bluetooth) contain sensitive information, and encryption measures (such as WPA2/WPA3, HTTPS, TLS, etc.) are usually taken to protect data security; • Unless there are extremely rare cases where the configuration is not rigorous or the old device is not encrypted by default, it is not common to directly intercept a large amount of unencrypted data in real environments; • Such interception is illegal in most countries and regions. Legitimate security researchers also work under legal authorization or in test environments. In summary, if the data transmitted by wireless signals is not encrypted and the attacker is able to approach and use the right equipment, there is indeed a possibility of intercepting such data through wireless signals and stealing data. However, mainstream communication protocols today have introduced sufficient encryption methods to reduce this risk.