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Graphics Interchange Format  |  1996-06-12  |  79.9 KB  |  557x519  |  4-bit (15 colors)
   ocr: TRANSMISSION AND RECEPTION OF PEM MESSAGES Plaintext message Processed message toc Convert canonical message form encoding Printable Yes radix Convert 64 to required? Generate MIC; No altach authentification used? Encryption Yes Recover decrypt session key; intormation message required? Encryption Yes Encrypt include information message, key No No Generate MIC; cuthenticate Printable Yes Convert to message encoding radix 64 required? Convert message No from canonical form Processed message Piaintext message (a) Generic transmission: diagrom (b) Generic reception diagram FIGURE 1: The sender co ...