From: Implementation of searchable symmetric encryption for privacy-preserving keyword search on cloud storage
Content ID
Encrypted Document
1
\(ENC_{K_{2}}\left( D_{1}\right)\)
2
\(ENC_{K_{2}}\left( D_{2}\right)\)
3
\(ENC_{K_{2}}\left( D_{3}\right)\)
4
\(ENC_{K_{2}}\left( D_{4}\right)\)
5
\(ENC_{K_{2}}\left( D_{5}\right)\)