Abstract: A memory data protection apparatus including a storage device, a cipher, and a validator is provided. The storage device is embedded in a chip electrically coupled to an external memory for storing an offset value, a signature and a key. The cipher electrically coupled to the storage device and the external memory to receive the key includes an encrypter and a decrypter. The encrypter is capable of executing an encryption to output an encrypted data and an encrypted certified data. The decrypter is capable of executing a decryption to output a decrypted data. The validator electrically coupled to the storage device receives the signature, the offset value and the certified data and determines an access limit of the external memory by validating the certified data with the signature and the offset value. The memory data protection apparatus accesses an original data in the external memory according to the access limit.

Abstract: A memory data protection apparatus including a storage device, a cipher, and a validator is provided. The storage device is embedded in a chip electrically coupled to an external memory for storing an offset value, a signature and a key. The cipher electrically coupled to the storage device and the external memory to receive the key includes an encrypter and a decrypter. The encrypter is capable of executing an encryption to output an encrypted data and an encrypted certified data. The decrypter is capable of executing a decryption to output a decrypted data. The validator electrically coupled to the storage device receives the signature, the offset value and the certified data and determines an access limit of the external memory by validating the certified data with the signature and the offset value. The memory data protection apparatus accesses an original data in the external memory according to the access limit.