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USMaarten Bodewes
 

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  1. USMaarten Bodewes
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    <p>Security professional with many years of experience with the <em>practical application</em> of cryptographic algorithms and protocols. I've helped with the design of protocols and API's within international standardization bodies. Over 30 years of general experience with computers, starting with MSX Basic at an early age. I've developed in Java for as long as the language exists (Kotlin is looking good too).</p> <hr> <p><strong>Copy/paste security doesn't exist</strong>.</p> <p>Many of the high scoring answers on StackOverflow have displayed grave security mistakes.</p> <p>If the code runs it does not mean it is secure. I would guess that about 10% of the code posted on StackOverflow <em>could be</em> secure. If you want to learn cryptography I highly recommend Crypto I from Dan Boneh at Coursera as a (University level) introductory course.</p> <p>The chances that you are secure are minimal if you don't understand the cryptography in your code.</p> <p>The most basic and therefore most common security mistakes:</p> <ul> <li>not understanding the difference between encoding and encryption;</li> <li>using keys or IV's directly derived from text / passwords;</li> <li>using ECB mode encryption;</li> <li>using MD5, DES or other outdated cryptographic algorithms;</li> <li>not understanding on how to use an IV / nonce;</li> <li>performing password hashing (or key derivation) without applying PBKDF2, bcrypt or scrypt</li> <li>using ciphertext that is not protected by an authentication tag;</li> <li>thinking that OTP (XOR-encryption) can be made secure (without inventing an inefficient stream cipher);</li> <li>encryption without establishing trust (most browser based encryption);</li> <li>using textbook RSA or using RSA to directly encrypt messages;</li> <li>inventing transport based security instead of using (D)TLS;</li> <li>not using a cryptographically secure random number generator.</li> </ul>
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      1. POHow to enable WS-Security (Rampart) in a Axis2 JAX-WS service (provider side)?
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      1. POFinding the Encryption or Hashing method used
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      1. POJava Scanner newline recognition
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    1. COBefore going overboard trying to implement your own, why not try the advice here?http://stackoverflow.com/questions/1020320/how-to-do-pgp-in-python-generate-keys-encrypt-decrypt
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      1. POEncrypting a file with RSA in Python
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    2. COWhat do you mean, starts getting very big? What *problem* are you actually trying to solve? It seems to me that shoving a pre-made PKCS#11 module under OpenSSL would be exactly the way to do things if you want to keep it lightweight. What resources did you get with the smartcard?
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      1. POSimplest way to cryptographically sign a file and output in CMS format with a PKCS11 provider?
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    3. COWhat do you mean with bitwise multiplication? A bitwise AND?
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      1. POWill this algorithm generate a cryptographically-secure bitstream?
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