Generic Routing Encapsulation (GRE) is a secure VPN technology for use on unsecured Intranets or the Internet ?
The ____ _____ ____ is the only type of encryption that has been proven to be absolutely impossible to crack if used correctly.
one
time
pad
sole
Select the most secure of the following encryption standards ?
TDES
DES
AES
DDES
IKE is the protocol used to set up a ______ ________ in the IPsec protocol suite.
Association
Secure
safe
available
The goals of cryptography are ?
Non-repudiation
Efficiency
Integrity
Authentication
Confidentiality
None of these.
Stream ciphers are generally associated with:
Once off authentications
High speed
Are slow due to the nature of the stream merging with the pseudo-random bits
Hardware implementations
In probability theory the ________ _________ is that in some set of randomly chosen people some pair of them will have the same birthday.
birthday
paradox
algorithm
Random
_________ ____ ______________ is used alongside IPsec as a key management protocol incorporating the Oakley key exchange and Skeme key exchange inside the Internet Security Association and Key Management Protocol (ISAKMP) framework.
Internet
Key
Exchange
Important
With Cisco routers a GRE tunnel is not essential and traffic can be carried through untrusted networks using IPsec when tunnel mode is used ?
Auguste Kerckhoffs principle or law states that: “a cryptosystem should be secure even if everything about the system, except the key, is public knowledge”
A Virtual Private Network is either
A computer network in which some of the links between nodes are carried over devices that are configured with private IP addresses (192.168.x.x).
A computer network built in the home whose IP addresses consist entirely of private addresses (192.168.x.x) and accesses the Internet only by NAT.
A network between routers that is hidden from computers around them.
A computer network in which some of the links between nodes are carried by open connections or virtual circuits in some larger network instead of by physical wires.
For IPsec Encryption Transport mode order the protocols within the packet.
1. Outer IP
3. ESP
4. IP
5. Data
2. AH
Check the algorithms that are considered hashing functions
MD5
SHA-1
MD-56
SHA-256
