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Portable Network Graphic  |  1993-05-04  |  97KB  |  816x1056  |  8-bit (256 colors)
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OCR: Copyright Paul D Bain 1993 NSA's admissions and increases in computer power have all fueled the demand for method of encryption stronger than DES Public-Key Cryptography and RSA Public-key cryptog raphy emerged to satisfy the demand for encryption methods guaranteeing security that DES alone could not provide Whitfield Diffie and Martin Hellman invented public-key cryptogi raphy in 1976 primarily to solve the key management problem of DES 68 Ir public -key cryptog raphy each person receives set of keys, one public and one private, that work together to provide secure encryption. 69 The public -key encrypts messages that only the private -key can decrypt. The public -key is made known to all while the private-key is kept secret by the user Because the private- -key is not shared, the key ma ...