# Encryption and Cryptography

## Cryptography

* [Modular conversion, encoding and encryption online—Cryptii](https://cryptii.com/)
* [RSA Calculator](https://www.cs.drexel.edu/~jpopyack/IntroCS/HW/RSAWorksheet.html)
* [RSA Calculator by Syed Umar Anis](https://umaranis.com/rsa_calculator_demo.html)
* [RSA Calculator](https://www.tausquared.net/pages/ctf/rsa.html)
* [Rijndael\_Animation\_v4\_eng-html5](https://formaestudio.com/rijndaelinspector/archivos/Rijndael_Animation_v4_eng-html5.html)
* [Cryptography Introduction - GeeksforGeeks](https://www.geeksforgeeks.org/cryptography-introduction/)
* [Introduction to Cryptography / Tutorials / Knowledge Base - GPGTools Support](https://gpgtools.tenderapp.com/kb/how-to/introduction-to-cryptography)

## Encryption Visualization

* [Sha256 Algorithm Explained](https://sha256algorithm.com/)
* [applied\_crypto\_2021\_fall/sha256 at main · oconnor663/applied\_crypto\_2021\_fall](https://github.com/oconnor663/applied_crypto_2021_fall/tree/main/sha256)
* [How Does SHA-256 Work? - YouTube](https://www.youtube.com/watch?v=f9EbD6iY9zI)
* [Visual SHA-1](https://lock.cmpxchg8b.com/sha1/visualize.html)
* [AES cipher internals in Excel](https://www.nayuki.io/page/aes-cipher-internals-in-excel)
* [DES cipher internals in Excel](https://www.nayuki.io/page/des-cipher-internals-in-excel)
* [Mining Bitcoin with pencil and paper: 0.67 hashes per day](https://www.righto.com/2014/09/mining-bitcoin-with-pencil-and-paper.html)


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