以下是提供这类解决方案的公司资料：
Secure Net Key (SNK)
Digital Pathways, Inc.
201 Ravendale Dr. Mountainview, Ca.
97703-5216 USA
Phone: 415-964-0707 Fax: (415) 961-7487
Secure ID
Security Dynamics,
One Alewife Center
Cambridge, MA 02140-2312
USA Phone: 617-547-7820
Fax: (617) 354-8836
Secure ID uses time slots as authenication rather than challenge/response.
ArKey and OneTime Pass
Management Analytics
PO Box 1480
Hudson, OH 44236
Email: fc@all.net
Tel:US+216-686-0090 Fax: US+216-686-0092
WatchWord and WatchWord II
Racal-Guardata
480 Spring Park Place
Herndon, VA 22070
703-471-0892
1-800-521-6261 ext 217
CRYPTOCard
Arnold Consulting, Inc.
2530 Targhee Street, Madison, Wisconsin
53711-5491 U.S.A.
Phone : 608-278-7700 Fax: 608-278-7701
Email: Stephen.L.Arnold@Arnold.Com
CRYPTOCard is a modern, SecureID-sized, SNK-compatible device.
SafeWord
Enigma Logic, Inc.
2151 Salvio #301
Concord, CA 94520
510-827-5707 Fax: (510)827-2593
For information about Enigma FTP to: ftp.netcom.com in Directory/pub/sa/safeword
Secure Computing Corporation:
2675 Long Lake Road
Roseville, MN 55113
Tel: (612) 628-2700
Fax: (612) 628-2701
debernar@sctc.com
非混杂模式网络接口设备
以前，大多数IBM DOS兼容机器的网卡都不支持混杂模式，所以无法进行sniffing。
但DOS已退出计算机网络舞台，对于现在计算机市场中的网络接口设备，请向供给商查询
是否为非混杂模式设备（即不支持混杂模式）。
