new encryption as promised i spoke today with the company mentioned in a washington times article about the clipper chip announcement the name of the company is secure communicatiions technology information will be given at the end of this message on how to contact them basically they are disturbed about the announcement for many reasons that we are more specifically however mr bryen of secure communications brought to light many points that might interest most of the readers his belief is that at t was made known of the clipper well before the rest of the industry this is for several reasons several of which are a company of at t s size could never be able to make a decision to use the new chip on the same day it was announced months ago they proposed using their own chip for at t s secure telephone devices at t basically blew them off as being not interested at all this stuck them as strange until now also i spoke with art melnick their cryptographer he expressed several concerns over the new clipper chip the obvious backdoor will be able to let many people decrypt the code once the key is released to authorities the security of the crypto system is lost forever these keys can end up in the hands of any agency of the government the fact that the escrowed keys never change means that the algorithm is vulnerable over time to an attacker the classified algorithm may hide another backdoor but he feels that it is probably to keep people from forging fake serial numbers or changing the keys themselves additionally he feels that the nsa has probably spent enough time and money in working on a way to keep this chip from being reversed engineered that he feels that reverse engineering it will be very difficult to do he feels that they have developed a suitable technique to protect the chip from this attack also he feels that the chip is hardware encoded with the algorithm and not microcoded onto the chip additonally i spoke with mr melnick about their algorithm he couldn t tell me much about their new agorithm because it hasn t been patented yet however he told me a little the algorithm will be released for public review after patents have been granted for it this is so the crypto community can see that it is secure the algorithm is called nea for new encryption algorithm the details were sketchy because now it is held as a trade secret until the patent was issued but i was told that it will incorporate the following it will have fast encryption of data exact specs not given but mr melnick stated much faster than what an rs can put out it is a symmetric cipher just like idea and des it will use bit data blocks for encryption like des and idea the key length was not given to me but mr melnick states that it is adujustable and is more than adequate for security the algorithm is written in c and assembler in software form and can be ported to many platforms unlike the the clipper chip which is hardware only and cannot be made into software this i consider a definite plus for the nea for widespread use the algorithm will accomodate public key distribution techniques such as rsa or diffie hellman this will also be supported in the hardware chip right now the projected cost of the nea chip will be about dollars for each clipper will run each chip that is if it is produced enough which probably won t happen they currently sell a program called c com that uses the algorithm and a special streaming protocol that does not divide the encrypted data into blocks this could prevent plaintext attacks if you know what the block header is this program operates at all supported rs speeds and uses the software implementation of the algorithm most importantly it does not have a backdoor right now the company is afraid that the new clipper chip will put them out of business this is a very real possibility so they really need help in stopping the clipper chip from becoming a standard if you want to contact them they can be reached at secure communications technology georgia ave suite silver spring md i talked to mr bryen who represents the company he can answer any questions you have any factual errors occurring in this write up are my own and i apologize for them ahead of time psionic wam umd edu fight the wiretap chip ask me how c craig h rowland amiga pgp key available those who would give up liberty for by request security deserve neither a
