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C839- Intro To Cryptology

Terms in this set (32)

CRL (Certificate Revocation List)
A list of certificates that a CA has revoked. Certificates are commonly revoked if they are compromised, or issued to an employee who has left the organization.
Block Cipher
An encryption algorithm in which data is encrypted in "chunks" of a certain length at a time. Popular in wired networks.
OCSP (Online Certificate Status Protocol)
A protocol that performs a real-time lookup of a certificate's status.
AES
advanced encryption standard, a symmetric 128-bit block data encryption technique; replaced DES
Class 3 algorithms
DES, 3DES, SHA, AES (some AES implementations are Type I)
Symmetric Encryption
the same key is used to encode and decode
DES (Data Encryption Standard)
A shared-key encryption algorithm that uses a 56-bit
encryption key to encode data in 64-bit blocks.
MIME (Multipurpose Internet Mail Extensions)
encode the content of the message body so that the receiving email client can display the message as it was received
Replay Attack
An attack where the data is captured and replayed. Attackers typically modify data before replaying it
IPSec (Internet Protocol Security)
A Layer 3 protocol that defines encryption, authentication, and key management for TCP/IP transmissions. IPSec is an enhancement to IPv4 and is native to IPv6. IPSec is unique among authentication methods in that it adds security information to the header of all IP packets.
Class 1 algorithms
Juniper (block cipher), MAYFLY (asymmetric), FASTHASH (hashing), WALBURN (high bandwith link encryption), PEGASUS (satellite telemetry)
Certificate Authority
an organization that issues public and private keys and records the public key in a digital certificate
SSL (Secure Sockets Layer)
A method of encrypting data to provide security for communications over networks such as the Internet. TLS (Transport Layer Security) is a later version on SSL
Ciphertext-only attack
Attacker ONLY has access to the ciphertext of messages.
Class 3 certificates
servers and software signing, for which independent verification and checking of identity and authority is done by issuing CA
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