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5

Actually, encryption schemes exist that can never be defeated. 'With enough time, any encryption can be broken' is not necessarily true.
– Marcks Thomas
Commented Nov 26, 2013 at 12:58
5

@MarcksThomas - please provide at least a link to those unbeatable encryption schemes to show what you mean.
– SPRBRN
Commented Nov 26, 2013 at 13:20
20

@rxt One-time pads are information-theoretically secure. Of course, they also have some pretty serious downsides.
– user
Commented Nov 26, 2013 at 13:26
2

OTP is an impossible algorithm. the keylength must be the same as the message length, so if you have a secure channel to transmit the key (which is essential, because if you ever use a key for more than one message, the OTP can be attacked through lexicographical analysis), you might as well use that same secure channel to pass the message in the first place.
– Frank Thomas
Commented Nov 26, 2013 at 13:31
7

@FrankThomas The Wikipedia article mentions some situations in which OTPs can actually be useful. The most obvious is where you have a secure channel now but need to be able to communicate with provable security later. For normal communications, however, they are indeed impractical (though hardly "impossible"; ever tried doing AES-256 with paper and pencil?).
– user
Commented Nov 26, 2013 at 13:37

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Correct minor typos or mistakes
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create code fences with backticks ` or tildes ~
```
like so
```
add language identifier to highlight code
```python
def function(foo):
print(foo)
```
put returns between paragraphs
for linebreak add 2 spaces at end
_italic_ or **bold**
indent code by 4 spaces
backtick escapes `like _so_`
quote by placing > at start of line
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[example](https://example.com)
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