Abstract: Different storage and compression formats of computer information are discussed. After the relationship between the formats of computer information storage and the leakage of electromagnetic information has been tested in three aspects; time-domain, frequency-domain and radiation field, a conclusion is reached that in the same display mode, the leakage of electromagnetic information is independent of the storage formats of computer information. As the theoretical foundation, this useful conclusion is of value for the future system design of anti-leakage of computer electromagnetic information.

Key words: formats of information storage, EMC test, anti-information leakage, information security