Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>The main problem of contemporary cryptography is not finding algorithms but whole concepts and approaches for different situations (but of course the algorithms are continually improved too).</p> <p>We have today</p> <ul> <li>Symmetric algorithms (AES)</li> <li>Asymmetric algorithms (RSA, ECC)</li> <li>Key exchange (Diffie-Hellman-Key-Exchange, Shamir's no key protocol)</li> <li>Secret sharing (intersection of n-dimensional planes)</li> <li>Cryptographic hash functions (SHA)</li> </ul> <p>Some have proven insecure and were improved</p> <ul> <li>DES due to a much to small key-space</li> <li>MD5</li> </ul> <p>and some are broken</p> <ul> <li>Merke/Hellman knapsack cryptosystem</li> <li>Monoalphabetic subsitution</li> <li>Naive Vigenère</li> </ul> <p>Which particular algorithm is chosen is often a question of available resources (elliptic curves need smaller keys that RSA algorithm for comparable safety) or just of standardization (as <em>tanascius</em> pointed out, there are competitions for such <a href="http://en.wikipedia.org/wiki/NIST_hash_function_competition" rel="noreferrer">algorithms</a>). Totally new trends usually start when a whole class of cryptosystems has been shown vulnerable against a specific attack (man-in-the-middle, side-channel) or scientific progress is made (quantum cryptography).</p> <p>Of course, there is also steganography which doesn't attempt so conceal the <em>content</em> but the <em>existence</em> of a secret message by hiding it in other documents.</p>
    singulars
    1. This table or related slice is empty.
    1. PONew cryptographic algorithms?
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USDario
    1. USDario
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    2. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    3. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTUpMod
    1. CO+1. Very complete answer imho.
      singulars
      1. PO
      1. USereOn
    2. COIf you want a good primer for how AES works, http://www.moserware.com/2009/09/stick-figure-guide-to-advanced.html is a solid explanation.
      singulars
      1. PO
      1. USWayne Werner
    3. CONote that steganography is orthogonal to encryption: Traditional steganography just hides the plaintext, even though you can additionally hide the ciphertext. It's also different to plausible deniability, e.g. as used by TrueCryupt.
      singulars
      1. PO
      1. UStc.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload