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Free Books:
Installing OpenSSL on Windows
This section provides a tutorial example on how to install OpenSSL on a Windows system. 2017-10-29, 41477👍, 18💬
💬 2017-10-29 Max: Te possino! How I obtain the .o, .h files to use like include in my .c mail file?
💬 2017-02-03 Jim: Now run along...
"OpenSSL" Viewing Certificates in DER and PEM
This section provides a tutorial example on how to use 'OpenSSL' to view certificates in DER and PEM formats generated by the 'keytool -exportcert' command. 2017-05-27, 29787👍, 5💬
💬 2017-05-27 Herong: Yes, asn1parse is a nice tool. I will add some examples later.
💬 2017-05-23 Herong: Poshak, do you need any help with your certificate?
💬 2017-05-23 Derek Callaway: openssl asn1parse is also useful for displaying certificate contents...
💬 2017-05-23 poshak: MIIC8DCCAIGgAwIBAgIJAM/+E5HIKoWGMAoG ...
💬 2017-10-29 Abi: Very informative
💬 2017-03-10 appalaraju: useful
💬 2017-06-17 Herong: Neil, I will try my best. Thanks for the comment.
💬 2017-06-14 Neil Shrestha-Birtch: It helped me! thanks for keeping this resource up.
"keytool" Exporting Certificates in DER and PEM
This section provides a tutorial example on how to export certificates in DER and PEM format using the 'keytool -exportcert' command. 2016-06-27, 16855👍, 2💬
Validating a Certificate Path with OpenSSL
This section provides a tutorial example on how to perform validation of a certificate path with the 'openssl verify' command. 2015-10-14, 16094👍, 5💬
What Is PKCS5Padding?
This section describes what is PKCS5Padding - a schema to pad cleartext to be multiples of 8-byte blocks. 2016-06-16, 14741👍, 8💬
💬 2016-04-04 ankit: this is me.
💬 2017-08-24 Superman: <script>alert("xss");< /script>
💬 2016-09-01 Shubham: well done.
"keytool" Importing Certificates in DER and PEM
This section provides a tutorial example on how to use 'keytool' to import certificates in DER and PEM formats generated by 'OpenSSL' into 'keystore' files. 2016-04-01, 11217👍, 1💬
CipherDES.java - A Java Implementation of DES
This section provides a tutorial Java program, CipherDES.java - A Java Implementation of DES encryption and decryption algorithm. 2017-02-16, 9302👍, 9💬
DES Key Schedule (Round Keys Generation) Algorithm
This section describes DES (Data Encryption Standard) algorithm - A 16-round Feistel cipher with block size of 64 bits. 2018-02-24, 7801👍, 13💬
PDF Printing Version: Cryptography Tutorials
Information on how to obtain the PDF version of this book for printing. 2018-01-21, 5639👍, 31💬
💬 2018-01-21 ahmed: thanks for your sharing
💬 2017-08-18 yamai: how can I design a java program
💬 2017-08-15 James Deam: Thanks! Amazing..
💬 2017-06-26 sunil: Good material
💬 2017-02-17 xiaoxiaoyuanzi: the one i'm looking for, Thanks!
First 8336 Hex Digits of PI
This section provides first 8336 hex digits of constant PI, 3.1415927..., needed for Blowfish encryption algorithm. 2016-10-31, 4402👍, 8💬
💬 2017-12-09 Herong: See the next tutorial: SHA1 Message Digest Algorithm Overview.
💬 2017-12-04 V: where can we find sha-1 formula ?
💬 2016-01-16 raza: i am raza see you latter
💬 2015-10-09 Ash: Please can u explain clearly..I dint understood
💬 2017-03-13 dingdong: heheheheehhe
💬 2016-10-15 Herong: Akash, can you check to ensure your key is a DSA key?
💬 2016-02-29 Herong: sah, is that an encoded comment?
Illustration of DSA Algorithm: p,q=7,3
This section provides a tutorial example to illustrate how DSA digital signature algorithm works with small prime modulus p=7 and prime divisor q=3. 2018-04-24, 2287👍, 5💬
💬 2016-03-21 peter winzell: x is not selected according to 0 < x < q
💬 2015-10-19 Herong: Hi Marian, do you have a question about this tutorial?
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