Unverified50% confidenceFactExact time
GPLv2要求分发者以不超过物理复制成本的价格提供源代码，有效期至少三年；GPLv3增加了反Tivoization条款和专利授权条款
1
Sources
50%
Confidence
Long-term
Relevance
8/24/2026
First Seen
Sources
Related Entities
Related Claims
UnverifiedGPLv3 added anti-Tivoization clauses and patent grant clauses.79% similarUnverifiedCopyleft licenses (such as GPL, LGPL, and AGPL) require that derivative works be released under the same or compatible open-source licenses.68% similarUnverifiedGPL系列许可证具有Copyleft传染性，要求衍生作品同样开源，对商业应用形成天然壁垒67% similarVerifiedThe Apache 2.0 license requires modifications to be documented, while the GPL license requires that derivative works also be open-sourced63% similarVerifiedGPL v3 added anti-circumvention clauses targeting Tivoization (device lockdown), prohibiting the use of hardware signing mechanisms to prevent users from running modified software.62% similar
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