An SV message encryption and decryption method based on IEC 61850 standard

The invention discloses an SV message encryption and decryption method based on IEC 61850 standard, including: step 1, a key management center sending key information to a message sender and a messagereceiver, step 2, setting the number of iteration; step 3, the message send calculating an encryption key; 4, extracting instMag partial information data of IEC 61850 SV message; step 5, performing encryption iterative operation; 6, adding the encrypted result into an IEC 61850 SV message; step 7, sending a message after the verification is passed; step 8, the message receiver calculating a decryption key; 9, extracting instMag partial information data in that IEC 61850 SV message; 10, performing decryption iterative operation; 11, combining the messages after decryption to obtain corresponding electrical quantities. On the premise of satisfying the real-time performance of power system communication, the security of SV sampling value message is guaranteed, which requires less computational resources and high spe