Abstract Syntax Notation One (ASN.1), 94, 341
access control list (ACL), 242
access control mechanism, 76
access control service, 73
access right, 76
ACE/server, 116
action field, 146
active attack, 55, 58
active directory, 306
ActiveX control, 197
Address Resolution Protocol (ARP), 44
address-based authentication scheme, 118
Advanced Encryption Standard (AES), 90
aggressive mode exchange, 244
Andrew File System (AFS), 294
anomaly detection, 374
AntiSniff, 57
AP exchange, 300
applicability statement, 28, 29
applicability status, 29
application gateway, 137, 171
application-level gateway, 138, 171
ARPA Internet, 12
ARPANET, 12
AS exchange, 300
asymmetric cryptography, 90
asynchronous transfer mode (ATM), 35
Athena project, 296
attack signature recognition, 374
attacker, 9
attribute authority, 338
attribute certificate, 338, 343
authenticated firewall traversal, 166
authentication, 111
authentication and authorization infrastructure (AAI), 305, 353
authentication and key distribution system, 21
authentication exchange mechanism, 77
authentication header (AH), 159, 227
authentication server, 298
authentication service, 72
authorization data field, 306
automatic teller machine (ATM), 113
autonomous, 4
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