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Diffstat (limited to 'security/hydan/DESCR')
| -rw-r--r-- | security/hydan/DESCR | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/security/hydan/DESCR b/security/hydan/DESCR new file mode 100644 index 00000000000..3603354d9df --- /dev/null +++ b/security/hydan/DESCR @@ -0,0 +1,23 @@ +Hydan steganographically conceals a message into an application. It +exploits redundancy in the i386 instruction set by defining sets of +functionally equivalent instructions. It then encodes information in +machine code by using the appropriate instructions from each set. + +Features: + - Application filesize remains unchanged + - Message is blowfish encrypted with a user-supplied + passphrase before being embedded + - Encoding rate: 1/110 + +Primary uses for Hydan: + - Covert Communication: embedding data into binaries creates a + covert channel that can be used to exchange secret messages. + - Signing: a program's cryptographic signature can be embedded + into itself. The recipient of the binary can then verify + that it has not been tampered with (virus or trojan), and is + really from who it claims to be from. This check can be + built into the OS for user transparency. + - Watermarking: a watermark can be embedded to uniquely + identify binaries for copyright purposes, or as part of a DRM + scheme. Note: this usage is not recommended as Hydan + implements fragile watermarks. |