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Portable Network Graphic  |  1993-05-04  |  100KB  |  816x1056  |  8-bit (255 colors)
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OCR: Copyright Paul D. Bain, 1993 DES Information is first encrypted with a DES key and then the DES key is encrypted with the RSA public c-key, forming digital envelope 73 The digital enveloped file is then either communicated or stored with absolute security. The digital envelope decrypted by first using the RSA private -key and then the DES key. When used with DES RSA provides unprecedented security while providing the additional functions of authenticity and integrity. RSA encryption provides security relatively stronger than DES because it employs a 512-bit encryption key. RSA also provides significant security by not requiring distribution of the private- key used for decrypting RSA also provides authenticity and integrity through a digital signature The digital signature acts like tamper ...