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However, fundamental mechanisms and control strategies underlying the spatiotemporal programmability remain insufficiently explored, thus the information capacity and security levels are still restricted. Here we report a non\u2010thermal and spatiotemporally controllable strategy to gate the morphing kinetics of shape\u2010memory hydrogel via photoisomerization. Upon functionalization of azobenzene moieties, multiple amide\u2010amide hydrogen bonds are incorporated into the poly(acrylamide) hydrogel. These hydrogen bonds, with strong time\u2010temperature dependence, act as stress\u2010damping units that decelerate the network's inherent elastic recovery, providing a mechanism for time\u2010encoded autonomous\u2010shape\u2010morphing. Photoisomerization of the pendant azobenzene moieties modulate the thermodynamic state of the hydrogen bonds, thus can control the morphing kinetics. Through orthogonal time and photo\u2010spatial programming of the dynamic interactions, the hydrogel can autonomously execute sophisticated shape transformations along predetermined pathways, thereby serving as a carrier for storing geometric information. This work demonstrates the feasibility of time\u2010encoded shape morphing and establishes an alternative strategy to conventional optics\u2010based encryption, providing enhanced data capacity and security through time\u2010dependent geometric encoding.<\/jats:p>","DOI":"10.1002\/adma.73919","type":"journal-article","created":{"date-parts":[[2026,7,7]],"date-time":"2026-07-07T07:40:38Z","timestamp":1783410038000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Time\u2010Encoded Geometric Encryption Enabled by Shape\u2010Memory Hydrogel with Photoisomerization\u2010Gated Autonomous Recovery"],"prefix":"10.1002","volume":"38","author":[{"given":"Baoyi","family":"Wu","sequence":"first","affiliation":[{"name":"Zhejiang Cancer Hospital Hangzhou Institute of Medicine (HIM) Chinese Academy of Sciences Hangzhou China"},{"name":"State Key Laboratory of Chemical Engineering and Low\u2010carbon Technology College of Chemical and Biological Engineering Zhejiang University  Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yijun","family":"Su","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Chemical Engineering and Low\u2010carbon Technology College of Chemical and Biological Engineering Zhejiang University  Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qiao","family":"Ke","sequence":"additional","affiliation":[{"name":"Zhejiang Cancer Hospital Hangzhou Institute of Medicine (HIM) Chinese Academy of Sciences Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Muqing","family":"Si","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Advanced Marine Materials Zhejiang Key Laboratory of Extreme\u2010Environmental Material Surfaces and Interfaces Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences  Ningbo 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