0-day: Zero Day
"Zero Day", in the security context, indicates that someone takes advantage of a security vulnerability on the same day that the vulnerability becomes generally known.

128-bit encryption
128 bit encryption indicates that the size of the key used to encrypt the message is 128 bits. 128-bit encryption, used in the 3DES and other algorithms, represents a very strong method of encryption for the forseeable future.

128-bit keys
128-bit keys is an industry standard encryption key length for the Internet and wireless communications. It is the strongest encryption available on market as of 2005.

2600 - The Hackers Quarterly
"2600 - The Hackers Quarterly" is a magazine devoted to hacking, cracking, and freedom of information. The online versions are available on www.2600.com.

3DES: Triple DES
3DES or Triple DES is a mode of the DES encryption algorithm that encrypts data three times with three 64-bit keys used, for an overall key length of 192 bits. Data Encryption Standard (DES) is a long-standing US encryption standard with symmetric-key encryption method standardized by ANSI in 1981 as ANSI X.3.92. DES uses a 56-bit key and uses the block cipher method, which breaks text into 64-bit blocks and then encrypts them. 3DES is a much more secure standard than the original DES.

3-way handshake
3-way handshake is a process used to establish a TCP connection. Basically, machine A sends a packet with a SYN flag set to Machine B. B acknowledges A's SYN with a SYN/ACK. Machine A then acknowledges B's SYN/ACK with an ACK.

40-bit encryption
40 bit encryption indicates that the size of the key used to encrypt the message is 40 bits. 40-bit SSL encryption standard was used in symmetric encryption in early IE and Netscape browsers and other Internet and wireless communications. Unfortunately, 40-bit encryption has proved too easy to decipher or crack in practice. Now, 128-bit encryption (3DES or TDES) have replaced the 40-bit encryption keys.

56-bit encryption
56 bit encryption indicates that the size of the key used to encrypt the message is 56 bits. 56-bit encryption standard was used in DES and RC5 encryption algorithm. Unfortunately, 56-bit encryption has proved too easy to decipher or crack in practice. Now, 128-bit encryption (in 3DES or TDES) have replaced the 56-bit encryption keys (DES).

64-bit encryption
64 bit encryption indicates that the size of the key used to encrypt the message is 64 bits. 64-bit encryption standard was used in some early Internet and wireless communication encryption algorithms such as DES and WEP. Unfortunately, 64-bit encryption has proved too easy to decipher or crack in practice. Now, 128-bit encryption (in 3DES or TDES) have replaced the 64-bit encryption keys (DES).

64-bit keys
64-bit keys is an industry standard encryption key length for the Internet and wireless communication. It is widely used in the symmetric encryption algorithms such as DES and WEP.

802.1
802.1 is the IEEE protocol suite for internetworking of LAN, MAN, WAN, LAN security, and management. 802.1 protocol suites include 802.1D, 802.1P, 802.1Q, 802.1S, 802.1W, 802.1X, etc.

802.11i
802.11i is a security standard defined by IEEE for wireless local area networks (WLANs) that provides improved encryption for networks that use the 802.11a, 802.11b and 802.11g standards. The 802.11i standard requires new encryption key protocols, known as Temporal Key Integrity Protocol (TKIP) and Advanced Encryption Standard (AES).

802.1x
802.1x is an IEEE standard for port-based network access control, particularly useful for securing 802.11 wireless local area networks (WLANs). The IEEE 802.1X offers an effective framework for authenticating and controlling user traffic to a protected network, as well as dynamically varying encryption keys. 802.1X ties a protocol called EAP (Extensible Authentication Protocol) to both the wired and wireless LAN media and supports multiple authentication methods, such as token cards, Kerberos, one-time passwords, certificates and public key authentication. Therefore 802.1X is also known as EAP over LAN (EAPOL).