Project Summary
GnuTLS is a secure communications library implementing the SSL and TLS protocols and technologies around them. It provides a simple C language application programming interface (API) to access the secure communications protocols as well as APIs to parse and write X.509, PKCS #12, OpenPGP and other required structures. It is aimed to be portable and efficient with focus on security and interoperability.
In a Nutshell, GnuTLS...
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has a well established, mature codebase
maintained by a very large development team
with increasing Y-O-Y commits -
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took an estimated 81 years of effort (COCOMO model)
starting with its first commit in March, 2000
ending with its most recent commit 8 days ago
Quick Reference
GNU General Public License v3.0 or later
Permitted
Commercial Use
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Include Copyright
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These details are provided for information only. No information here is legal advice and should not be used as such.
GNU Lesser General Public License v2.1 or later
Permitted
Commercial Use
Modify
Distribute
Forbidden
Sub-License
Hold Liable
Required
Distribute Original
Disclose Source
Include Copyright
State Changes
Include License
Include Notice
These details are provided for information only. No information here is legal advice and should not be used as such.
Project Security
Vulnerabilities per Version ( last 10 releases )
Project Vulnerability Report
Security Confidence Index
Vulnerability Exposure Index
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30 Day SummaryAug 3 2026 — Sep 2 2026
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12 Month SummarySep 2 2025 — Sep 2 2026
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