The invention discloses a cloud
DICOM file security sharing
system and method based on attribute-based
encryption, and the method comprises the steps: analyzing a
DICOM file into a file header and pixel data through a data owner
client, carrying out the symmetric
encryption of the pixel data, carrying out the attribute-based
encryption of a symmetric key and the file header under the constraint of an access strategy, and carrying out the encryption of the symmetric key and the file header; a safe
DICOM packet is generated and uploaded to a
cloud storage server; and when the attribute of the data visitor
client meets the access strategy, the data visitor
client recovers the symmetric key and the file header from the secure DICOM packet by using the private key, decrypts the pixel data and recombines the DICOM file. According to the method, the cloud only stores the
ciphertext, fine-grained attribute
access control and
ciphertext-level management during strategy updating are realized, the leakage risk of the cloud is reduced, and the method is suitable for multi-institution medical
image sharing.