SNMPv3 also uses community strings, but allows for secure authentication and communication between SNMP manager and agent.

What are community strings in SNMP?

What Is an SNMP Community String? An SNMP community string is a means of accessing statistics stored within a router or other device. Sometimes referred to simply as a community string or an SNMP string, it comprises the user credential—ID or password—delivered alongside a GET request.

What encryption does SNMPv3 use?

SNMPv3 Security with 256 bit AES encryption is available in many products today. AES-256 enhances encryption capabilities of SNMPv3 beyond the SNMPv3 standard. Some network devices, including most Cisco devices, support SNMP with 256 bit AES.