User's Manual Part 4

Access / One
®
Network
190 Glossary of Terms
GL
PPTP
(Point-to-Point Tunneling Protocol) A protocol from Microsoft that is used to
create a virtual private network (VPN) over the Internet. It uses Microsoft's Point-
to-Point Encryption (MPPE), which is based on RSA's RC4. It only uses static
keys and should not be used to secure WLANs. See also, VPN.
pre-master secret
A key generated during the handshake process in Transport Layer Security (TLS)
protocol negotiations and used to derive a master secret. See also, TLS.
private key
In cryptography, one of a pair of keys, one public and one private, that are
created with the same algorithm for encrypting and decrypting messages and
digital signatures. The private key is provided to only the requestor and never
shared. The requestor uses the private key to decrypt text that has been
encrypted with the public key by someone else. See also, public key.
PSK
(Pre-Shared Key) The IEEE 802.11 term for a shared secret, also known as a
shared key. See also, 802.11x and shared secret.
PTK
(Pair-wise Transient Key) A value derived from a pair-wise master key (PMK) and
split into multiple encryption keys and message integrity code (MIC) keys for
use by a client and server as temporal session keys for IEEE 802.11i robust
security. See also, 802.11i and PMK.
public key
In cryptography, one of a pair of keys, one public and one private, that are
created with the same algorithm for encrypting and decrypting messages and
digital signatures. The public key is made publicly available for encryption and
decryption. See also, encryption and private key.