Tutorial Books:

"OpenSSL" Generating Certificates in DER and PEM

This section provides a tutorial example on how to generate certificates in DER and PEM formats using 'OpenSSL'. 2023-05-24, 12523👍, 4💬

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. 2023-05-03, 8152👍, 7💬

💬 2023-05-03 **Zavala**: Greetings from the Tower

💬 2023-03-27 **Davide**: Greetings from Italy

💬 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?

What Is PKCS5Padding?

This section describes what is PKCS5Padding - a schema to pad cleartext to be multiples of 8-byte blocks. 2023-04-12, 45855👍, 33💬

💬 2023-04-12 **{"partnerReferenceNo": "APP12345**: ok

💬 2023-01-18 **Servant of Elon Musk's Regent**: You are the chosen one!

💬 2022-11-17 **Elon Musk's Regent**: mommy

💬 2022-11-14 **Elon Musk**: Giving away twitter to the first person to reply and call me mommy

Illustration of DSA Algorithm: p,q=23,11

This section provides a tutorial example to illustrate how DSA digital signature algorithm works with small prime modulus p=23 and prime divisor q=11. 2023-03-21, 4447👍, 9💬

💬 2018-06-09 **Herong**: Adrian, you are welcome!

💬 2018-06-09 **Adrian**: I needed in rush working 64-bit keys. You helped me a lot. Thanks! :D

💬 2023-02-22 **aaa**: 124, 52, -95, -30, 47, 95, -105, -1, -114, -38, -100, -84, 40, -3, 36, -13

💬 2019-04-22 **xyz**: $9$RTHhSlWL7VsguO7dbw4oiHqf6CuOIRhyl K4JGDq.TQF/OIcyeLXNbsPTz3CAW8X

💬 2018-10-16 **Marco**: mi chiedo che cosa potrebbe essere tutto questo

RsaKeyValidator.java for RSA Key Validation

This section provides a tutorial example on how to validate RSA keys by encrypting and decrypting some random sample messages. 2023-02-19, 538👍, 2💬

What Is DER (Distinguished Encoding Rules) Encoding?

This section describes the DER (Distinguished Encoding Rules) - A binary format of encoding a data value of any data types including nested data structures. 2023-02-13, 25386👍, 11💬

💬 2022-12-02 **Victor**: meaningful comments.

Build New Curves with tinyec

This section provides a tutorial example on how to create elliptic curve, actually a reduced elliptic curve group, with tinyec Python library. 2022-12-27, 235👍, 1💬

Illustration of RSA Algorithm: p,q=5,7

This section provides a tutorial example to illustrate how RSA public key encryption algorithm works with 2 small prime numbers 5 and 7. 2022-12-11, 7796👍, 10💬

💬 2022-12-11 **Racheal mweemba**: This was helpful

💬 2022-12-11 **Racheal Mweemba**: ❤️❤️❤️❤️

EC Key in PEM File Format

This section provides a tutorial example on the EC key PEM file format. EC domain parameters are stored together with the private key. 2022-10-01, 2019👍, 0💬

Generate secp256k1 Keys with OpenSSL

This section provides a tutorial example on how to generate EC (Elliptic Curve) private and public key pairs using secp256k1 domain parameters. 2022-10-01, 1828👍, 0💬

"secp256r1" - For 256-Bit ECC Keys

This section describes 'secp256r1' elliptic curve domain parameters for generating 256-Bit ECC Keys as specified by secg.org. 2022-10-01, 1465👍, 0💬

"brainpoolP256r1"“ - For 256-Bit ECC Keys

This section describes 'brainpoolP256r1' elliptic curve domain parameters for generating 256-Bit ECC Keys as specified by RFC 5639. 2022-10-01, 1084👍, 0💬

Elliptic Curve Point Addition Example

This section provides algebraic calculation example of adding two distinct points on an elliptic curve. 2022-10-01, 646👍, 0💬

Elliptic Curve Point Doubling Example

This section provides algebraic calculation example of point doubling, adding a point to itself, on an elliptic curve. 2022-10-01, 483👍, 0💬

Download and Install tinyec

This section describes how to install tinyec, which can be done by running the 'pip install tinyec' command. 2022-10-01, 426👍, 0💬

"openssl ecparam -list_curves" - Curves Supported by OpenSSL

This section provides a list of Elliptic Curves supported by OpenSSL. 2022-10-01, 403👍, 0💬

"secp256k1" - For 256-Bit ECC Keys

This section describes 'secp256k1' elliptic curve domain parameters for generating 256-Bit ECC Keys as specified by secg.org. 2022-10-01, 370👍, 0💬

Identity Element on an Elliptic Curve

This section describes the 'identity element', which is the 'infinity point' in our addition and subtraction operations on an elliptic curve. 2022-10-01, 356👍, 0💬

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