In real life, it is illegal to crack a safe without permission, which will cause serious damage to the property safety of others, so I cannot provide you with an explanation of the relevant illegal methods. Safes are security devices used to protect important items and property, and their design purpose is to prevent unauthorized opening. Legal opening of safes usually occurs in the following situations: 1. **Owner authorization**: The owner of the safe personally operates or authorizes others to open it according to the prescribed procedures, such as when the safe is normally used to store and retrieve items. 2. **Law enforcement agencies, etc. based on legal procedures**: For example, in cases involving investigation of crimes, execution of legal procedures, etc., after strict approval and legal procedures, the relevant law enforcement or judicial agencies will open the safe in accordance with the law to obtain evidence or perform other legal tasks.