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NNTPS
NNTPS (Network News Transfer Protocol Secure) is the encrypted version of NNTP, which facilitates the distribution, querying, retrieval, and posting of Usenet articles using TLS/SSL encryption to ensure privacy and integrity during data transmission..
NNTPS, operating on port 563, is the secure variant of the Network News Transfer Protocol (NNTP). Unlike standard NNTP, which transmits data in plaintext, NNTPS wraps all communication within SSL/TLS tunnels, providing data confidentiality against eavesdropping and ensuring message integrity. The encryption is initialized at connection time, similar to how HTTPS secures HTTP.
The NNTP protocol itself is a client-server communication model functioning mainly for distributing and reading network news articles on Usenet. Commands and article data are exchanged following a defined command set. When secured with TLS/SSL as with NNTPS, the protocol remains the same functionally, but gains a security layer protecting the interpretation of authentication credentials and messages.
NNTPS is typically supported by news readers to establish a trusted channel between clients and news servers, especially where sensitive discussions take place or compliance requirements mandate encryption. It is widely deployed in environments prioritizing secure content delivery and privacy in newsgroup communications.