|
Match
|
Document |
Document Title |
|
|
4074066 |
Message verification and transmission error detection by block chaining
A message transmission system for the secure transmission of multi-block data messages from a sending station to a receiving station. The sending station contains cryptographic apparatus operative...
|
|
|
3962539 |
Product block cipher system for data security
A device for ciphering a block of data bits under control of a cipher key. The cipher device performs a ciphering process for the block of data by carrying out an operation in which the block of...
|
|
|
3958081 |
Block cipher system for data security
A device for ciphering message blocks of data bits under control of a cipher key. The cipher device performs an enciphering process for each message block of data by carrying out a predetermined...
|
|
|
3921151 |
Apparatus for enciphering transmitted data by interchanging signal elements of the transmitted data without overlapping or omitting any elements within the transmitted signal train
An information signal train which may, for example, be an audio signal, is divided into equal time intervals and temprarily stored. Each stored element is read out in a random pattern so as to...
|
|
|
3798360 |
STEP CODE CIPHERING SYSTEM
This specification discloses a system that provides multiple level encipherment of a block of data by means of a stepped block cipher process. A data stream consisting of digital information is...
|
|
|
3798605 |
CENTRALIZED VERIFICATION SYSTEM
This specification describes a multi-terminal data processing system having means and process for verifying the identity of subscribers to the system. Validity of a terminal request for...
|
|
|
3798359 |
BLOCK CIPHER CRYPTOGRAPHIC SYSTEM
A cryptographic system for encrypting a block of binary data under the control of a key consisting of a set of binary symbols. The cryptographic system is utilized within a data processing...
|
|
|
3796830 |
RECIRCULATING BLOCK CIPHER CRYPTOGRAPHIC SYSTEM
This is a cryptographic system for enciphering a block of binary data under the control of a subscriber cipher key consisting of a preassigned combination of binary symbols. The block of data is...
|
|
|
3773977 |
METHOD OF ENCIPHERED INFORMATION TRANSMISSION BY TIME-INTERCHANGE OF INFORMATION ELEMENTS
An information signal train which may, for example, be an audio signal, is divided into equal time intervals and temprarily stored. Each stored element is read out in a random pattern so as to...
|
|
|
3749832 |
BINARY CODED SIGNAL AND CIPHERING AND DECIPHERING METHOD AND SYSTEMS EMBODYING SAME
For avoiding the transmission of coded servicing signals on a transmission path between transmitting and receiving ends of a binary coded ciphered signal syste, each ciphered signal is formed, at...
|
|
|
3657699 |
MULTIPATH ENCODER-DECODER ARRANGEMENT
A multipath encoder-decoder arrangement which consists of a plurality of storage devices such as memory cells, for example, which can be shifted from one series configuration into at least a second...
|
|
|
3064080 |
Transmission system-selection by permutation of parity checks
|