Characteristics of advanced symmetric block ciphers

Advanced block cipher Description
introduction
traffic Posted in 2001, NIST
traffic designed to overcome problems with 3DES
length of the Block containing 128 bits
traffic key length of 256 bits and 128.192
traffic Standard symmetric block cipher Key somewhere.
Description
traffic security
traffic using the S-Box as non-linear components
traffic software implementations
traffic performance through parallelism
traffic runs on various platforms
traffic without reducing the tour so not incresed speed
traffic with limited space environments
Traffic For S-units of preliminary computer and logical representation used
containing very low ROM and RAM requirements
traffic hardware implementation
traffic with maximum performance is not affected by the size of the key
traffic attack on Implementation
traffic Masking method is used to protect the power of time attack and attack
traffic encryption over the transcription
main characteristics of the traffic is slower than the encryption settings for decryption
traffic Basic matriculation examination
traffic once the key schedule to generate all subkeys
Conventional encryption issues
traffic traffic distribution
containing a random number generator
traffic distribution keys
Traffic distribution
traffic analysis of traffic demand
containing two ways for traffic analysis
traffic traffic analysis attacks
traffic Knowledge company focusing on machines about message length
traffic Covert Channel
Traffic analysis attacks
traffic partner Person (authentication partners)
traffic Frequency communication between partners
Traffic Pattern post
traffic message length
Number of message traffic
traffic source and identify a special conversion receiver
covert channel
define traffic traffic Traffic patter, which create a hidden channel
containing unwanted network channel, rather than a designer
traffic responsible for Security attacks
traffic example:
Unwanted traffic officer reported by external persons and do not receive Identity Management company focusing on machines about de ESTA link
Link Encryption approach
Network layer containing headers are encrypted (packet header are encrypted), which reduced opportunities for traffic analysis
traffic end-to-end traffic remain unprotected
traffic to avoid traffic pading above attack is used
Encrypt traffic Padding
End-to-end encryption approach
Encrypted traffic is applied in the transport layer, the application layer or
traffic network layer traffic is unprotected and the attacker can gain access to it
traffic to avoid filling the above attack is used
Padding is applied to the containing blocks of data to maintain homogeneity or transport-level or application-level
traffic zero message can be inserted randomly into the stream
key distribution
traffic if the sender and the recipient (B) then
traffic, you can choose the key and physically deliver B
third-party traffic can choose the key and physically deliver it to a and b
traffic If a and b with a previously unavailable, and a key one party can pass the new key to a friend, is encrypted with the old key
traffic If a and B each have an encrypted connection with the third party, then C can deliver the key to the encrypted channels a and b.
Key hierarchy Model
Turnkey Script Distribution
Key Control Transparent
traffic known as automatic key distribution scheme
traffic to ensure end-to-end encryption at the network layer and transport layer
traffic is used to end the connection to the destination Protocol (TCP)
traffic SSM (security module session) is responsible for monitoring key
Automatic keypad lock distribution Scheme
the sender host transmits a query containing joins SSM package
SSM traffic packages and stores belongs to the KDC for permission to establish a connection
traffic page link between the KDC and SSM is encrypted master key that the KDC If approved by a connection request, it generates a session key and supplies it to the two best SSM
traffic Query SSM can now release the connection request packet and connection is established between two end systems
Automatic keypad lock distribution Scheme
Decentralization of control Key
request the sender to the recipient containing the session key and includes a temporary value N1
traffic receiver responds with an encrypted message which includes a master session key key jointly selected a receiver, receiver and the identifier F (N1) and another single room N2.
traffic using the new session key, the sender gets F (N2) to the.
Decentralization of control Key
The use of a key management
traffic is controlled by two key methods
traffic Automated key distribution
traffic distribution of keys was Shogun application
Encryption key traffic data to the message in the network
containing the key figures of the PIN encryption for personal identification
traffic encryption key File for file storage and public places accessible to
traffic encryption and decryption of vector control
traffic More flexible
traffic control in conjunction with a key vector in the key generation
Vector control encryption