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See Cryptographic Erase.
NIST SP 800-88 Rev. 1
A method of Sanitization in which the Media Encryption Key(MEK) for the encryptedTarget Data (or the KeyEncryption Key–KEK) is sanitized, making recovery of the decrypted Target Data infeasible.
NIST SP 800-88 Rev. 1 under Cryptographic Erase