Authentication information at a first portion of encrypted data may be identified. A cryptographic key may be derived based on a combination of an identification of the first portion of the received encrypted data and a master key. Additional authentication information may be generated based on a combination of the derived cryptographic key and another portion of the received encrypted data. The encrypted data may be verified by comparing the authentication information at the first portion of the received encrypted data with the generated additional authentication information. In response to verifying the received encrypted data, a second cryptographic key may be derived based on a combination of an identification of the another portion of the encrypted data and the master key. The other portion of the received encrypted data may be decrypted by using the second cryptographic key.