Research Article

[Retracted] MEMS Sensors in Tennis Teaching and Training under the Background of Big Data Intelligent Communication

Table 3

Security mode.

Horizontal modeSafe modeSafe mode level

Horizontal mode 0Safe mode 0Connection not allowed
Horizontal mode 1Safe mode 1No safety requirements
Horizontal mode 1Safe mode 2Signature or encryption, no MTTM protection
Horizontal mode 2Safe mode 1Need to encrypt the link, no MITM protection
Horizontal mode 2Safe mode 2MITM protected signature or encrypted link
Horizontal mode 3Safe mode 1Encrypted connection and MITM protection