length of encrapted file

ks

Hi,

AFAIK symetric encryption always works with block where the block size is the length of the key. How comes that a 1 byte file is stored in a file also containing only 1 byte?
Shouldn't it be 256/8= 32 bytes? Same with file size that are not a multiple of 32.

Best regards
KS

Robert

Hi KS,

as stated in our Knowledge Base, BoxCryptor uses CFB as cipher mode for the last partial block. According to Wikipedia:

"CFB, OFB and CTR modes do not require any special measures to handle messages whose lengths are not multiples of the block size, since the modes work by XORing the plaintext with the output of the block cipher."

--Robert