Method and apparatus for encrypting data

An apparatus for encrypting data, comprising:

• one or more processors;
• and
• one or more memories;
• wherein
• the one or more memories is configured to store program codes that when executed by the one or more processors cause the one or more processor to implement the following operations:
• acquiring a first data unit included in a media frame to be encrypted, wherein the first data unit comprises a boundary portion and a content portion, the boundary portion comprises boundary information for identifying a starting boundary of the first data unit, and the content portion comprises content data of the first data unit;
• and
• encrypting the content data included in the content portion of the first data unit to acquire a second data unit, wherein a boundary portion of the second data unit comprises the boundary information, and a content portion of the second data unit comprises a data length of the content data and encrypted data acquired by encrypting the content data,
• wherein the boundary portion of the second data unit is unencrypted, and the boundary information comprises an identification code which is configured to indicate a type of the content data, the type being parameter information or media data.