cryptcat

Listen on a port with encryption

$ cryptcat -k password -l -p 1234

$ cryptcat -k password host 1234

$ cryptcat -k password -w 10 host 1234

$ cryptcat -v -z host 1-1024

$ cryptcat -k password -l -p 8080 | cryptcat -k password host 80

$ cryptcat -k password -l -p 1234 < file.txt

cryptcat [options] [hostname] [port]

cryptcat is netcat with twofish encryption capabilities. It provides the same functionality as netcat but with encrypted data transmission for secure communication over untrusted networks.

-k PASSWORD

Specify encryption password

Listen mode (act as server)

Specify local port number

Timeout for connects and final net reads

Zero-I/O mode (scanning)

Verbose mode

Numeric-only IP addresses, no DNS

UDP mode instead of TCP

Execute command after connect (use with caution)

Both ends must use the same password for encryption. This tool is intended for authorized security testing and legitimate encrypted communication. Using -e to execute commands creates significant security risks.

cryptcat was developed as a secure version of netcat, adding twofish encryption to prevent eavesdropping on network communications.

nc(1), netcat(1), ncat(1), socat(1)