network profile
| bio | website | stevenvh.net |
|---|---|---|
| location | Flanders, Belgium | |
| age | 52 | |
| visits | member for | 11 months |
| seen | Jan 21 at 7:47 | |
| stats | profile views | 1 |
That's "Steven" (with the "n" at the end)
"The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts." — Bertrand Russell
Product designer, consumer electronics: audio (with Philips), home automation.
Done computer science in a previous life too.
Belbin team roles: Plant and Resource Investigator
Personal values: respect, honesty, pride, modesty, fairness
I yell because I care
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Jan 19 |
comment |
Is a steganographic technique which has a universal decoder novel/secure? @mhum - That's how I understand steganography too. Because the "encryption" method is known you indeed have to rely on the message being invisible in another message. That's what the "obscurity" means. But when Eve suspects a steganographically hidden message, she can read it just like if it were plaintext. If you want to hide the fact that you're sending a message then there are better ways. You need some other (dummy) message to send the secret message. You can still send noise continuously, which won't decode to anything sensible, until you send an actual message. |
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Jan 17 |
comment |
Is a steganographic technique which has a universal decoder novel/secure? @Bram - That's an addition to fix the weakness of steganography: it doesn't encrypt, it just hides. |
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Jan 16 |
comment |
Is a steganographic technique which has a universal decoder novel/secure? @Bram - When I use an actual encryption method, say AES, I can safely hand you the crypttext plus I can tell you it's AES encoded. Can you decrypt it? Not without the key. If you, OTOH, want to "encrypt" using steganography, you can't disclose the method, otherwise your message will be disclosed. If you use steganography to hide an AES encrypted message then the steganography doesn't add anything: the steganographed message will be retrieved and the ultimate security depends solely on the AES. The term "obscurity" refers to the hding of the method, which is bad as a principle. |
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Jan 16 |
awarded | Teacher |
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Jan 16 |
comment |
Is a steganographic technique which has a universal decoder novel/secure? @Bram - like I said security by obscurity isn't safe. Once Eve discovers your method, she can decrypt any message you send. If you encrypt using AES then let her know that, she still needs the key, which you can change with every message if you want to add extra security. (You can use Diffie-Hellman's key exchange algorithm to generate a new key every time.) |
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Jan 15 |
answered | Is a steganographic technique which has a universal decoder novel/secure? |
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Jun 16 |
awarded | Autobiographer |
