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How secure is it to use Bluetooth handsfree?

  • Can't someone eavesdrop the signals and listen to the conversation?
  • Does encryption in Bluetooth secure the information?
  • Can I use anyother tool to secure more the Bluetooth I use?
  • SDR is not what you would use to eavesdrop – schroeder Jul 29 '19 at 10:59
  • If you are not using RTL-SDR, then how? – just_learning Jul 29 '19 at 11:42
  • @just_learning RTL-SDR is not the right tool for this. Generally the RTL chips max out at about 1.7GHz, while BT uses 2.4GHz. There's however other SDRs available, albeit at typically ten times the price. – vidarlo Jul 29 '19 at 12:01
  • Ok, supposing that an attacker has this expensive device, can he eavesdrop bluetooth communication? – just_learning Jul 29 '19 at 12:07
  • This question is way too broad as is. Without providing the BT version, this question can't be answered. An answer I made to another question gives much more detail because the question gave enough information to determine BT version. It also links to related questions and answers that might be useful. Without more info, the answer could be anything from "not secure at all" to "quite secure". BT LE 4.2 is secure, at least. – forest Jul 30 '19 at 1:29