基于转移椭圆曲线Diffie-Hellman密钥交换的OpenPGP邮件转发
OpenPGP Email Forwarding Via Diverted Elliptic Curve Diffie-Hellman Key Exchanges
摘要：
离线OpenPGP用户可能希望将部分或全部电子邮件转发给第三方。由于消息是加密的，这需要将它们转换为可由预期转发方解密的密文，同时保持机密性和身份验证。在最近的工作中表明，这可以通过代理重新加密方案来实现，然而，虽然加密电子邮件转发是代理重新加密的最常见应用，但据我们所知，它尚未在OpenPGP上下文中实现。在本文中，我们适应了开创性的技术介绍了Blaze，Bleumer和施特劳斯在EUROPENTPT '98，允许邮件传输代理转换和转发OpenPGP消息，而无需访问解密密钥或明文。我们还提供了实施细节和安全分析。
英文摘要：
An offline OpenPGP user might want to forward part or all of their email messages to third parties. Given that messages are encrypted, this requires transforming them into ciphertexts decryptable by the intended forwarded parties, while maintaining confidentiality and authentication. It is shown in recent lines of work that this can be achieved by means of proxy-re-encryption schemes, however, while encrypted email forwarding is the most mentioned application of proxy-re-encryption, it has not been implemented in the OpenPGP context, to the best of our knowledge. In this paper, we adapt the seminal technique introduced by Blaze, Bleumer and Strauss in EUROCRYPT'98, allowing a Mail Transfer Agent to transform and forward OpenPGP messages without access to decryption keys or plaintexts. We also provide implementation details and a security analysis.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
