6 Best Free Online Bifid Cipher Websites

Here is a list of best free online Bifid cipher websites. Bifid Cipher is a classical encryption technique that uses the combination of Polybius Square and Transposition Cipher techniques to encode and decode data. Nowadays, it is not considered secure for modern cryptographic applications. However, it is still used for educational purposes, low-security communication applications, and simple password generation. If you want to perform encoding and decoding operations using the Bifid cipher technique, check out these online Bifid cipher websites.

Through these websites, users can encrypt or encode plain text data into the ciphertext. To do that, users need a secret message and a key. Similarly, users can use the Ciphertext and the key used at the time of encryption to decode the data. Most of these websites explain the Bifid cipher to users. Besides this, users also get an explanation of the Polybius square method used in the Bifid cipher on some websites. To help new users, I have included the necessary Bifid encryption steps in the description of each website.

These websites have related cipher tools like Enigma Machine, Caesar Cipher, Affine Cipher, Atbash Cipher, and more. Go through the list to learn more about these websites.

My Favorite Online Bifid Cipher Website:

cryptii.com is my favorite website as it explains Bifid cipher and performs both Bifid encoding and decoding operations.

You can also check out lists of best free Online ADFGVX Cipher Decoder, Online Bacon Cipher, and Online Base58 Decoder websites.

Comparison Table:

Features/Website Names	Can encode and decode data	Explains Bifid Cipher	Offers Additional Cipher Tools
cryptii.com	✓	✓	✓
boxentriq.com	✓	✓	✓
rumkin.com	✓	✓	✓
braingle.com	✓	✓	x
geocachingtoolbox.com	✓	x	x
calcoolator.eu	✓	✓	x

cryptii.com

cryptii.com is a free online bifid cipher website. This website helps users encode plain data into ciphertext using the bifid cipher algorithm. It also offers an inbuilt decoder to decode the data encrypted through the bifid encoder tool. At the time of encoding, it needs the plain text and a key. Similarly, it needs cipher text and the key used at the time of encoding to decrypt the data. It also explains the Bifid cipher. Now, follow the below steps.

How to perform bifid cipher encoding online using cryptii.com:

Visit this website and access the Bifid Cipher section.
After that, choose the Encode section.
Now, enter the input data in the Plaintext field.
Next, enter a key.
Finally, view the encoded data of cipher text that can be decoded using the Decode section.

Additional Features:

This website offers multiple cipher tools like Enigma Machine, Caesar Cipher, Affine Cipher, ROT13 Cipher, and more.

Final Thoughts:

It is one of the best free online Bifid cipher websites that can encode and decode data using the Bifid cipher technique.

Pros	Cons
Can perform both Bifid cipher encoding and decoding operations
Explains Bifid cipher

Home Page

boxentriq.com

boxentriq.com is another free online bifid cipher website. This website offers a simple Bifid cipher decoder and encoder tool. This tool allows users to encode plain text data into cipher text and vice-versa. Along with plain text, users also need to enter an encryption key to perform the encoding process. Similarly, a key is used at the time of decoding along with the ciphertext to view the original data. Through this tool, users can encrypt input data of up to 25 characters. It also describes the Bifid cipher. Now, follow the below steps.

How to perform Bifid cipher encoding online using boxentriq.com:

Go to this website and access the Bifid cipher decoder and encoder tool.
After that, choose the Encrypt tool and enter the plain text.
Now, specify the encryption key.
Finally, view and copy the ciphertext.

Additional Features:

This website offers multiple classic cipher, text, word, analysis, and modern cipher tools.

Final Thoughts:

It is another good online Bifid cipher website that can encode and decode data using the Bifid cipher method.

Pros	Cons
Can encode and decode data using the Bifid cipher method
Describes Bifid cipher
Offers various cipher tools

Home Page

rumkin.com

rumkin.com is another free online bifid cipher website. This website properly explains the Bifid cipher encoding and decoding process. It also describes Bifid cipher to help out users. Both encoding and decoding operations can be performed on this website. Plus, tools to adjust some encoding parameters are also present like use last occurrence of a letter instead of the first, reverse the key before keying, reverse the alphabet before keying, etc. Now, follow the below steps.

How to perform Bifid cipher encoding online using rumkin.com:

Launch this website and access the Bifid section.
Now, choose Encrypt from the Operating Mode.
Next, enter a key and enable/ disable available settings.
Finally, enter the data that you want to encrypt in the message section to view the encoded cipher text.

Additional Features:

This website offers multiple cipher tools like American Sign Language, Atbash, Binary, Gold Bug, Rot13, Webdings, and more.

Final Thoughts:

It is another good online Bifid cipher website that explains Bifid cipher and performs both Bifid encoding and decoding operations.

Pros	Cons
Can encode and decode data using the Bifid cipher method
Describes Bifid cipher in detail

Home Page

braingle.com

braingle.com is another good online bifid cipher website. This website offers a simple Bifid cipher website that can perform both Bifid cipher encoding and decoding operations. It also explains the Polybius Square used in the Bific cipher. However, it doesn’t need a key with the input data to perform the bifid cipher encoding or decoding process, unlike other similar websites. Now, follow the below steps.

How to perform Bifid cipher encoding online using braingle.com:

Visit this website and access the Bifid Cipher.
Now, enter the text data in the Plaintext field.
Next, click on the Encipher button to view the encoded data.
Similarly, users can decode the data by submitting the ciphertext in the Ciphertext field.

Additional Features:

This website offers multiple online tools like Cigenere Cipher, Autokey Cipher, Trifid Cipher, Playfair Cipher, Autokey Cipher, and more.

Final Thoughts:

It is another good online bifid cipher website that helps users perform both bifid cipher encoding and decoding operations.

Pros	Cons
Can encode and decode data using the Bifid cipher method
Describes Polybius Square used in the Bifid cipher method

Home Page

geocachingtoolbox.com

geocachingtoolbox.com is another free online bifid cipher website. With the help of this website, users can perform Bidif cipher encoding and decoding operations. To do that, users can fill in the key square manually. However, users can also use a standard square key or even a random square key to perform the encryption operations. Now, follow the below steps.

How to perform Bifid cipher encoding online using geocachingtoolbox.com:

Launch this website using the given link.
After that, enter a key square, standard square key, or choose a random square key.
Now, choose the Encrypt method from the Method menu.
Next, enter the data that you want to encrypt and view the encoded data in the Result field.

Additional Features:

This website offers useful tools like coordinate notation, coordinate conversion, track builder, event calendar, Vigenere Cipher, and more.

Final Thoughts:

It is another good online bifid cipher website that anyone can use without much hassle.

Pros	Cons
Can encode and decode data using the Bifid cipher method

Home Page

calcoolator.eu

calcoolator.eu is another free online bifid cipher website. This website offers multiple online tools, including a Bifid cipher tool. This tool explains the Bifid cipher and performs both Bifid cipher encoding and decoding operations. To perform encoding, it needs a key and input plain text data. Similarly, it needs key and ciphertext to conduct the decoding operations. Plus, it is quite simple to use. Now, check out the below steps.

How to perform Bifid cipher encoding online using calcoolator.eu:

Launch this website and access the Bifid Cipher.
After that, enter a key in the key field or generate a random key.
Now, submit the data you want to encrypt.
Finally, view the encrypted data.

Additional Features:

This website has multiple online calculators like Physics, Financial, Maths, Health, Chemistry, Electric, and more.

Final Thoughts:

It is another good online bifid cipher website that helps users encode and decode data using the bifid cipher method.

Pros	Cons
Can encode and decode data using the Bifid cipher method
Explains Bifid cipher

Home Page

Frequently Asked Questions

What is the bifid cipher?

Bifid Cipher is a classical encryption technique that uses the combination of Polybius Square and Transposition Cipher techniques to encode and decode data. Nowadays, it is not considered secure for modern cryptographic applications. However, it is still used for educational purposes, low-security communication applications, and simple password generation.

How hard is it to break the bifid cipher?

Bifid Cipher is considered moderately secure compared to simple substitution ciphers. Its use of digraphs and transposition adds complexity, but modern cryptanalysis techniques can often break it given enough ciphertext and effort.

What is the history of bifid cipher?

The development of Bifid Cipher is credited to French cryptographer Felix Delastelle, who published it in his book "Traité Élémentaire de Cryptographie" in 1902. Likely an evolution from the Polybius Square cipher, adding transposition for increased complexity. Primarily seen as a recreational or educational cipher, not intended for highly sensitive communication.

What is the weakness of the bifid cipher?

Due to the 5x5 grid and omission of "J", the maximum number of unique keys is only 25^2-1 (624). Compared to modern ciphers with vast key spaces, this makes it much easier for attackers to brute-force the key.

Web Applications