ZMQ\_NULL(7) 0MQ Manual ZMQ\_NULL(7)

# [NAME](#NAME)

zmq\_null - no security or confidentiality

# [SYNOPSIS](#SYNOPSIS)

The NULL mechanism is defined by the ZMTP 3.0 specification: **http://rfc.zeromq.org/spec:23**. This is the default security mechanism for ZeroMQ sockets.

# [SEE ALSO](#SEE_ALSO)

[**zmq\_plain**(7)](/man/enterprise-packages/zeromq-nocurve/zmq_plain.7) [**zmq\_curve**(7)](/man/enterprise-packages/zeromq-nocurve/zmq_curve.7) [**zmq**(7)](/man/enterprise-packages/zeromq-nocurve/zmq.7)

# [AUTHORS](#AUTHORS)

This page was written by the 0MQ community. To make a change please read the 0MQ Contribution Policy at **http://www.zeromq.org/docs:contributing**.

08/30/2026 0MQ 4.3.5

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Document: zmq_null(7) from zeromq-nocurve 4.3.5-r6 (Chainguard OS)
Source: https://github.com/zeromq/libzmq