The Cryptext Corporation claims that this feature allows for an effective key of 2 to the 350th power which is "Greater than 1 googol!".
#EUREKA CRYPTEXT CODE#
The CX-II alters its code sequence in a way that is random to the user but repeatable when decrypting the data. This option could be used after a set block of characters, after a varying number of characters or even multiple times after each character. A "Code Branch" feature allowed the CX-II to dynamically alter its code sequence. A ten character key (80 bits) provides a key length of 280, which was greater than the DES standard at the time, which only had a key length of 256. The key is ten characters in length and chosen by the user to encipher and later decipher the data.
The CX-II uses a proprietary algorithm to encipher data before storage or transmission. The story is a little better for the transmission of data, since the CX-II was 100 times faster than the typical 1200bps modems of the time, which transmitted only 150 characters per second. double-density floppy disk holds 360KB and would take 24 seconds to encrypt. Cryptext claimed the device could encrypt or decrypt at a rate of 15,000 characters per second, which was adequate for the microcomputers and storage needs of the early 1980s. The CX-II was a hardware-based device which gave faster encryption and decryption compared to software-based programs. There were also many software-based encryption programs available. In the late 1970s, DES was the accepted encryption standard and public key encryption was just becoming adopted.
#EUREKA CRYPTEXT GENERATOR#
The technology used by the CX-II is a pseudo-random number generator using a proprietary algorithm. The same CX-II unit could be used with other computers, using the interface card appropriate for that computer. The Applecrypt card was manufactured by Intercrypt and mounts in one of the I/O slots in the Apple II computer, using the standard 25 pin connector. The I/O extension cable is the second component and attaches the CX-II unit to the Applecrypt interface card, which is the third component. It has a connection for a 40 pin I/O cable. This is the unit that performs the hardware-based computations for encryption and decryption. and weighing 1 lb.) which has no exterior lights or buttons. The first is the CX-II unit itself, a molded epoxy brick (1.1 X 3.0 X 5.3 in. The CX-II encryption device has three components. Data is encrypted before being stored in memory, on physical media such as disk or tape, or transmitted by telephone lines. It was originally designed for use in the Radio Shack TRS-80 computer and in 1980 was available for the Apple II computer for a list price of $295. The Cryptext CX-II is a hardware encryption device introduced by the Cryptext Corporation for use in mini and micro computers in 1979. This is connected to the CX-II encryption device for the Apple II, manufactured by CRYPTEXT Corporation, 1981. Please contact the contributing institution for more information regarding the copyright status of this object.ĭescription Applecrypt (TM) peripheral circuit board by Intercrypt, copyright 1981, S/N 1004-002. Title Cryptext CX-II Data Encryption Device Creator Cryptext CorporationĬollection History San Jose Online Catalog
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