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1.1 root 1:
2:
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4: XSEND(1) UNIX Programmer's Manual XSEND(1)
5:
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7:
8: NNAAMMEE
9: xsend, xget, enroll - secret mail
10:
11: SSYYNNOOPPSSIISS
12: xxsseenndd person
13: xxggeett
14: eennrroollll
15:
16: DDEESSCCRRIIPPTTIIOONN
17: These commands implement a secure communication channel; it
18: is like _m_a_i_l(1), but no one can read the messages except the
19: intended recipient. The method embodies a public-key cryp-
20: tosystem using knapsacks.
21:
22: To receive messages, use _e_n_r_o_l_l; it asks you for a password
23: that you must subsequently quote in order to receive secret
24: mail.
25:
26: To receive secret mail, use _x_g_e_t. It asks for your pass-
27: word, then gives you the messages.
28:
29: To send secret mail, use _x_s_e_n_d in the same manner as the
30: ordinary mail command. (However, it will accept only one
31: target). A message announcing the receipt of secret mail is
32: also sent by ordinary mail.
33:
34: FFIILLEESS
35: /var/spool/secretmail/*.key: keys
36: /var/spool/secretmail/*.[0-9]: messages
37:
38: SSEEEE AALLSSOO
39: mail (1)
40:
41: BBUUGGSS
42: It should be integrated with ordinary mail. The announce-
43: ment of secret mail makes traffic analysis possible.
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63: Printed 7/27/90 1Q 1
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