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Paper screenshot

Why the decryptor can still use K to access the data even when K is updated? QAQ

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shijie deng
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  • Nevertheless, an issue will arise when the RABE scheme is implemented as a hybrid encryption scheme. That is, we use ABE to encrypt a symmetric-key K , and then encrypt the real data by a symmetric-key encryption scheme (e.g., AES) with K . Under the hybrid encryption setting, if a decryptor has previously decrypted and saved the symmetric-key K , then the decryptor can still use K to access the data even when the ABE ciphertext containing K is updated. – shijie deng Apr 04 '19 at 02:16
  • The Image content (Why the image is invalid ? QAQ) – shijie deng Apr 04 '19 at 02:18
  • merge you comments to your question , it is better – hardyrama Apr 04 '19 at 04:16
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    China just recently banned imgur, which is the image storage service provider of StackExchange. Would you kindly consider typing, or copypasting the text instead? – DannyNiu Apr 04 '19 at 06:02
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    Please provide a citation for the paper that contains this screenshot, so readers can look at the paper for more context. – Mikero Apr 05 '19 at 03:26
  • The screenshot is from :"Secure Fine-Grained Access Control and Data Sharing for Dynamic Groups in the Cloud" by Xu et al. in IEEE TIFS’18 – shijie deng Apr 08 '19 at 02:59

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