Unverified50% confidenceFactExact time
PGP initially used the RSA public-key algorithm and the IDEA symmetric algorithm, and managed public keys through a Web of Trust model rather than relying on a centralized certificate authority.
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50%
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Long-term
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10/15/2026
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Related Claims
UnverifiedThe Web of Trust model was first widely used in the PGP encryption system, where users mutually sign each other's public keys to establish a chain of trust without a central certification authority.75% similarUnverifiedThe RSA scheme uses private key signing and public key verification, offering relatively high security but generating longer activation codes.73% similarUnverifiedEarly PGP was not invulnerable in algorithm design and key management, and the security community later had a great deal of criticism, mostly focused on usability and key lifecycle management (revocation, expiration, recovery from loss, confirmation of public-key authenticity) rather than the encryption algorithms themselves.70% similarUnverifiedSSH密钥认证基于RSA（依赖大整数分解难题）或Ed25519（基于椭圆曲线离散对数难题）算法，私钥永远不离开本地设备70% similarUnverifiedPGP（Pretty Good Privacy）诞生于1991年，因密钥管理繁琐、信任模型去中心化等障碍从未真正大规模普及，2018年发现的EFAIL漏洞暴露了其与HTML邮件交互的设计缺陷67% similar
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