is NUS peripheral example from sdk 14 and later is sending encrypted data

[nikunj8086]

hi,

i am doing a project where i have to exchange strings between nrf52832 as peripheral and andoird smartphone using nrf connect app, in this project data security is a high priority so 

i am using pca 10028 as ble sniffer to read packets between nrf52832 and android phone. for NUS examples i am testing with sdk 14.2.0 and  15.0.0 and 12.3.0. and for ble sniffer i am using nrf_sniffer_2.0.0-beta-1 with wireshark tool.

in sdk v12.3.0 i am able to see open communication, and also nus strings are readable with in packets, but it is not same with sdk 14.2 and sdk 15.0 after connection established this is output from ble sniffer 

after that there is no packets are received but from phone to ble nus uart terminal i am seeing output.

 

 so i want to know that is in sdk 14.2 and sdk 15.0 nus strings over ble are encrypted or secured or not. if not then we have add encryption mechanism because data security over ble is a high priority.

please let me know,

thanks

[Håvard]

Hello nikunj8086. The NUS peripheral example (and the central example) do not use encryption.

There are several other examples that enable encryption by using the Peer Manager module.

Try having a look at one of these examples (such as Health Thermometer Service Sample Application, ble_app_hts)

There is information about the usage on infocenter, and I think there are some other threads here on devzone relating to using the Peer Manager.

[nikunj8086]

hi  Håvard ,

thanks for your response so i have tried with sdk 15.0.0 nus central example and nus peripheral example, with nrf ble sniffer 2.0.0 i found that sniffer captures the packets between nus central and peripheral but not continuously between the nus peripheral and nrf connect mobile app.

so i found that nus communication is not encrypted.