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Cryptography is the practice and study of encrypting information, or in other words, securing information from unauthorized access. There are many different cryptography laws in different nations. Some countries prohibit export of cryptography software and/or encryption algorithms or cryptoanalysis methods. In some countries a license is required to use encryption software, and a few countries ban citizens from encrypting their internet communication. Some countries require decryption keys to be recoverable in case of a police investigation. == Overview == Issues regarding cryptography law fall into four categories: * Export control, which is the restriction on export of cryptography methods within a country to other countries or commercial entities. There are international export control agreements, the main one being the Wassenaar Arrangement. The Wassenaar Arrangement was created after the dissolution of COCOM (Coordinating committee for Multilateral Export Controls), which in 1989 "decontrolled password and authentication-only cryptography."〔 (access restricted to current University of Toronto)〕 * Import controls, which is the restriction on using certain types of cryptography within a country. * Patent issues, which deal with the use of cryptography tools that are patented. * Search and seizure issues, on whether and under what circumstances, a person can be compelled to decrypt data files or reveal an encryption key. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cryptography law」の詳細全文を読む スポンサード リンク
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