The invention presents an encrypted content playback equipment capable of decryption and playback of an encrypted content by using key information when a key medium storing the key information is not inserted, an encrypted content playback method, a program, and a recording medium for storing the program.An encrypted content playback equipment 100 obtains key information 1 for a key medium 120, and stores the key information 1 in a provisional-key storage memory 102 as provisional key 1a, and obtains provisional-key usage limitation information 2 for limiting the use of provisional key 1a from the key medium 120. The encrypted content playback equipment 100 judges whether the provisional key 1a is usable or not based on the provisional-key usage limitation information 2, and if usable, plays back an encrypted content 3 by using the provisional key 1a.