Reading up on MuPDF
1 deep · digging since oct 29
- The case of the 9 bit AES key
Several PDF implementations generate AES-256 keys from tiny state spaces (9 bits in MuPDF) or insecure timestamp-based randomness, enabling trivial key recovery.
One topic. Every takeSeek and you shall find
1 deep · digging since oct 29
Several PDF implementations generate AES-256 keys from tiny state spaces (9 bits in MuPDF) or insecure timestamp-based randomness, enabling trivial key recovery.