I am currently in the process of trying to obtain clearance to export some custom computers out of the U.S. The computers have Dropbear, and the lawyers have questions about Dropbear encryption that I can't answer. Unfortunately, I can not find any documentation online with the answers either. I'd appreciate it if anyone can give the answers or can point me to where I can find the answers.
Here are the questions the lawyers have about Dropbear: 1. Describe the symmetric and asymmetric encryption algorithms and key lengths and how the algorithms are used (e.g., 56-bit DES, 168-bit DES, 128-bit RC4, 448-bit Blowfish, etc.). Specify which encryption modes are supported (e.g., cipher feedback mode or cipher block chaining mode). For any asymmetric algorithms, please specify whether the security of the algorithm is based upon any of the following: (a) factorization of integers in excess of 512 bits (e.g., RSA); (b) computation of discrete logarithms in a multiplicative group of a finite field of size greater than 512 bits (e.g., Diffie-Hellman over Z/pZ); or (c) discrete logarithms in a group other than mentioned above in excess of 112 bits (e.g., Diffie-Hellman over an elliptic curve). 2. State the key management algorithms, including modulus sizes, that are supported (e.g., 512-bit RSA, 1024-bit Diffie-Hellman, etc.). (I'm sure the answers will be useful to anyone trying to obtain export clearance for something that uses Dropbear.) Thanks, Edward Wang
