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@ -13,46 +13,46 @@ Picocrypt for Windows is as easy as it gets. To download the latest, standalone,
Picocrypt for MacOS is also very easy to use. Download the latest, standalone, and portable executable for MacOS <u><strong><a href="https://github.com/HACKERALERT/Picocrypt/releases/download/1.11/Picocrypt.app.zip" target="_blank">here</a></u></strong>. Older releases are available under Releases. MacOS might show a notice that Picocrypt is malware (it isn't) and disable opening it. To fix this, open Finder, Ctrl and right click on Picocrypt, and hit "Open". You might have to do this two times to open Picocrypt. After opening Picocrypt, be patient while Picocrypt loads. It might take a couple seconds. Picocrypt for MacOS is also very easy to use. Download the latest, standalone, and portable executable for MacOS <u><strong><a href="https://github.com/HACKERALERT/Picocrypt/releases/download/1.11/Picocrypt.app.zip" target="_blank">here</a></u></strong>. Older releases are available under Releases. MacOS might show a notice that Picocrypt is malware (it isn't) and disable opening it. To fix this, open Finder, Ctrl and right click on Picocrypt, and hit "Open". You might have to do this two times to open Picocrypt. After opening Picocrypt, be patient while Picocrypt loads. It might take a couple seconds.
<strong>Linux</strong> <strong>Linux (Debian-based)</strong>
Linux is currently not supported. Picocrypt for Debian-based Linux distros is coming soon.
<br> <br>
Note: For some reason, there's an outdated and useless tool called PicoCrypt on the Internet, which was last updated in 2005. PicoCrypt is not related to Picocrypt (this project). <strong>Make sure you only download Picocrypt from this Github repository to ensure that you download the correct and backdoor-free software. Downloading from somewhere else could mean that you're downloading malicious and hacked software!</strong> Note: For some reason, there's an outdated and useless piece of abandonware called PicoCrypt on the Internet, which was last updated in 2005. PicoCrypt is not related to Picocrypt (this project). <strong>Make sure you only download Picocrypt from this Github repository to ensure that you download the correct and backdoor-free software. Downloading from somewhere else could mean that you're potentially downloading malicious or hacked software!</strong>
# Why Picocrypt? # Why Picocrypt?
Why should you use Picocrypt, instead of Bitlocker, NordLocker, VeraCrypt, or 7-Zip? Here are some reasons why you should switch to Picocrypt: Why should you use Picocrypt, instead of Bitlocker, NordLocker, VeraCrypt, or 7-Zip? Here are some reasons why you should switch to Picocrypt:
<ul> <ul>
<li>The only safe encryption is the one you do yourself. Don't trust cloud providers to "encrypt" your data, because you'll never know if they do it or not. Picocrypt is meant to be the simplest tool to allow you to take control over your confidential data and protect it with the most secure modern standards available.</li> <li>The only safe encryption is the one you do yourself. Don't trust cloud providers to "encrypt" your data, because you'll never know if they do it or not. Picocrypt is meant to be the simplest tool to allow you to take control over your confidential data and protect it with the most secure and modern standards available.</li>
<li>Unlike NordLocker, Bitlocker, and many cloud storage providers, Picocrypt and its dependencies are FOSS (free open-source software) and can be audited. You can verify for yourself that there aren't any backdoors or flaws.</li> <li>Unlike NordLocker, Bitlocker, and most cloud storage providers, Picocrypt and its dependencies are FOSS (free open-source software) and can be audited. You can verify for yourself that there aren't any backdoors or flaws.</li>
<li>Picocrypt is portable and <i>tiny</i> (just 3MB!). It's much lighter than NordLocker (>100MB) and VeraCrypt (>30MB). The raw Python file can run any machine and the standalone .exe can run on any Windows PC from 7 and up. Picocrypt floats your boat without any bloat.</li> <li>Picocrypt is portable and <i>tiny</i> (just 3MB for Windows!). It's much lighter than NordLocker (>100MB) and VeraCrypt (>30MB). The standalone executables can run on any machine (Windows, MacOS, or Linux) and they run with no installation, dependencies, or admin privileges. Picocrypt floats your boat without any bloat.</li>
<li>It's infinitely easier to use than VeraCrypt (no need to create volumes) and a 5-year-old could probably use Picocrypt. All you need to do is select a file and enter a password.</li> <li>It's infinitely easier to use than VeraCrypt (no need to create volumes) and a 5-year-old could probably use Picocrypt. All you need to do is select your file(s) and enter a password. The internals such as encryption, authentication, and anti-corruption are completely handled by Picocrypt, so you don't have to worry about a thing.</li>
<li>Picocrypt is built for security, using modern standards and secure settings. See <strong>Security</strong> below for more info.</li> <li>Picocrypt is built for security, using modern standards and secure settings. It's carefully designed and uses well-known libraries to do cryptography. See <strong>Security</strong> below for more info.</li>
<li>It supports file integrity checking through Poly1305, which means that you would know if a hacker has maliciously modified your data. This is useful for transfering sensitive data where authenticity is crucial.</li> <li>It supports file integrity checking through Poly1305, which means that you would know if a hacker has maliciously modified your data. This is useful for transfering sensitive data where authenticity is crucial.</li>
<li>Picocrypt supports anti-corruption through Reed-Solomon. Unlike other encryption tools, Picocrypt actively protects your files by adding extra Reed-Solomon bytes, so if your file gets corrupted (ie. hard drive failure), Picocrypt can still fix the errors and decrypt your files. None of Bitlocker, NordLocker, VeraCrypt, or 7-Zip has this ability.</li> <li>Picocrypt supports anti-corruption through Reed-Solomon. Unlike other encryption tools, Picocrypt actively protects your files by adding extra Reed-Solomon bytes, so if your file gets corrupted (ie. hard drive failure), Picocrypt can still fix the errors and decrypt your files. None of Bitlocker, NordLocker, VeraCrypt, or 7-Zip has this ability.</li>
</ul> </ul>
# Instructions # Instructions
Picocrypt is about as simple as it gets. Just select a file, enter a password, and start. If you want to encrypt multiple files, add them to an archive or zip file and select it. There are some additional options that you can use for more control: Picocrypt is about as simple as it gets. Just drag and drop the file(s) and folder(s) you choose, enter a password, and start. There are some additional options that you can use for more control:
<ul> <ul>
<li>File metadata (editable for encryption, readonly for decryption): Use this to store notes, information, and text along with the file (it won't be encrypted). For example, you can put a description of the file before sending it to someone. When the person you sent it to selects the file in Picocrypt, your description will be shown to that person.</li> <li>File metadata (editable for encryption, readonly for decryption): Use this to store notes, information, and text along with the file (it won't be encrypted). For example, you can put a description of the file before sending it to someone. When the person you sent it to selects the file in Picocrypt, your description will be shown to that person.</li>
<li>Keep decrypted output even if it's corrupted or modified (decryption only): Picocrypt automatically checks for integrity upon decryption. If the file has been modified or is corrupted, Picocrypt will delete the output. If you want to keep the corrupted or modified data after decryption, check this option. Also, if this option is checked and the Reed-Solomon feature was used on the encrypted file, Picocrypt will attempt to recover as much of the file as possible during decryption, if it is corrupted.</li> <li>Keep decrypted output even if it's corrupted or modified (decryption only): Picocrypt automatically checks for integrity upon decryption. If the file has been modified or is corrupted, Picocrypt will delete the output. If you want to keep the corrupted or modified data after decryption, check this option. Also, if this option is checked and the Reed-Solomon feature was used on the encrypted file, Picocrypt will attempt to recover as much of the file as possible during decryption, if it is corrupted.</li>
<li>Securely erase and delete original file (encryption only): If checked, Picocrypt will use system internals to overwrite the input file(s) multiple times and delete it. This method is better than just deleting the original file, because the original file can still be recovered by hackers using special software. Picocrypt securely deletes the original file making sure that it's impossibe to retrieve the original file after deletion.</li> <li>Securely erase and delete original file (encryption only): If checked, Picocrypt will use system internals to overwrite the input file(s) multiple times and delete it. This method is better than just deleting the original file, because in that case, the original file can still be recovered by hackers using special software. Picocrypt securely deletes the original file making sure that it's impossibe to retrieve the original file after deletion.</li>
<li>Prevent corruption using Reed-Solomon (encryption only): This feature is very useful if you are planning on archiving important data on a cloud provider or external hard drive for a long time. If checked, Picocrypt will use the Reed-Solomon error correction code to add 13 extra bytes for every 128 bytes to prevent file corruption. This means that up to ~5% (13/128/2) of your file can corrupt, and Picocrypt will still be able to correct it and decrypt your files with no corruption. Obviously, if your file corrupts very badly (ie. you dropped your hard drive ), Picocrypt won't be able to fully recover your files, but it will try its best to recover what it can. Note that decryption is very slow because Picocrypt is reassembling and (if necessary) correcting broken bytes. The output will also be ~10% larger.</li> <li>Prevent corruption using Reed-Solomon (encryption only): This feature is very useful if you are planning on archiving important data on a cloud provider or external hard drive for a long time. If checked, Picocrypt will use the Reed-Solomon error correction code to add 13 extra bytes for every 128 bytes to prevent file corruption. This means that up to ~5% (13/128/2) of your file can corrupt, and Picocrypt will still be able to correct it and decrypt your files with no corruption. Obviously, if your file corrupts very badly (ie. you dropped your hard drive), Picocrypt won't be able to fully recover your files, but it will try its best to recover what it can. Note that decryption is very slow because Picocrypt is reassembling and (if necessary) correcting broken bytes. The output will also be ~10% larger.</li>
</ul> </ul>
# Security # Security
I have a solid understanding of cryptography and security is Picocrypt's primary focus. I was in need of a secure, reliable, and future-proof encryption tool that didn't require bloatware and containers, but I couldn't find one. That's why I created Picocrypt, which uses XChaCha20-Poly1305, which is a revision of the eSTREAM winner, Salsa20. XChaCha20-Poly1305 has been through a significant amount of cryptanalysis and was selected by security engineers at Google to be used in modern TLS suites. It's considered to be the future of symmetric encryption, and makes Picocrypt more secure than Bitlocker, NordLocker, and 7-Zip. It's used by Cloudflare, Google, and many other forward-thinking companies. In terms of physical security, I have 2FA enabled on all accounts with a tie to Picocrypt, so you can rest assured that the official Picocrypt repository won't be hacked. I have a solid understanding of cryptography and security is Picocrypt's primary focus. I was in need of a secure, reliable, and future-proof encryption tool that didn't require bloatware and containers, but I couldn't find one. That's why I created Picocrypt, which is a simple, but very secure encryption tool. It uses XChaCha20-Poly1305, which is a revision of the eStream winner, Salsa20. XChaCha20-Poly1305 has been through a significant amount of cryptanalysis and was selected by security engineers at Google to be used in modern TLS suites. It's considered to be the modern suite of symmetric encryption, and makes Picocrypt more secure than Bitlocker, NordLocker, and 7-Zip. It's used by Cloudflare, Google, and many other forward-thinking companies. In terms of practical security, I have 2FA enabled on all accounts with a tie to Picocrypt, so you can rest assured that the official Picocrypt repository won't be hacked.
For key derivation, Picocrypt uses Argon2(id), winner of the PHC (Password Hashing Competition), which was completed in 2015. Argon2 is even slower than Scrypt and Bcrypt (for those that don't understand crypto, this is a good thing), making GPU, ASIC, and FPGA attacks impractical due to the huge amount of RAM that is used and written to during the key derivation. For key derivation, Picocrypt uses Argon2(id), winner of the PHC (Password Hashing Competition), which was completed in 2015. Argon2 is even slower than Scrypt and Bcrypt (for those that don't understand crypto, this is a good thing), making GPU, ASIC, and FPGA attacks impractical due to the huge amount of RAM that is used and written to during the key derivation.
For key checking and corruption checks, SHA3-512 (Keccak) is used. Before decrypting, Picocrypt checks whether the password is correct by comparing <i>the derived key</i> to a SHA3-512 hash stored in the encrypted file. SHA3 is the latest standard for hashing recommended by the NIST. It's a modern and well-designed hash function that's open-source, unpatented, and royalty-free. For key checking and corruption checks, SHA3-512 (Keccak) is used. Before decrypting, Picocrypt checks whether the password is correct by comparing <i>the derived key</i> to a SHA3-512 hash stored in the encrypted file. SHA3 is the latest standard for hashing recommended by the NIST. It's a modern and well-designed hash function that's open-source, unpatented, and royalty-free.
XChaCha20-Poly1305, Argon2, and SHA3 are well recognized within the cryptography community and are all considered to be mature and future-proof. You can rely on these ciphers and algorithms to protect your data, as they are all modern and have undergone a large amount of cryptanalysis. XChaCha20-Poly1305, Argon2, and SHA3 are well-recognized within the field of cryptography and are all considered to be mature and future-proof. You can rely on these ciphers and algorithms to protect your data, as they are all modern and have undergone a large amount of cryptanalysis.
I did not write the crypto for Picocrypt. Picocrypt uses two Python libraries, <code>argon2-cffi</code> and <code>pycryptodome</code>, both of which are well known and popular within the Python community. For people who want to know how Picocrypt handles the crypto, or for the paranoid, here is a breakdown of how Picocrypt protects your data: I did not write the crypto for Picocrypt. Picocrypt uses two Python libraries, <code>argon2-cffi</code> and <code>pycryptodome</code> to do the heavy lifting, both of which are well known and popular within the Python community. For people who want to know how Picocrypt handles the crypto, or for the paranoid, here is a breakdown of how Picocrypt protects your data:
<ol> <ol>
<li>A 16-byte salt (for Argon2) and a 24-byte nonce (for XChaCha20) is generated using a CSPRNG (Python's <code>os.urandom()</code>)</li> <li>A 16-byte salt (for Argon2) and a 24-byte nonce (for XChaCha20) is generated using a CSPRNG (Python's <code>os.urandom()</code>)</li>
@ -67,13 +67,12 @@ I did not write the crypto for Picocrypt. Picocrypt uses two Python libraries, <
<li>If decrypting, compare the derived key with the SHA3-512 hash of the correct key stored in the ciphertext. If encrypting, compute the SHA3-512 of the derived key and add to ciphertext.</li> <li>If decrypting, compare the derived key with the SHA3-512 hash of the correct key stored in the ciphertext. If encrypting, compute the SHA3-512 of the derived key and add to ciphertext.</li>
<li>Encryption/decryption start, reading in 1MB chunks at a time. For each chunk, it is first encrypted by XChaCha20, and then a CRC (using SHA3-512) is updated.</li> <li>Encryption/decryption start, reading in 1MB chunks at a time. For each chunk, it is first encrypted by XChaCha20, and then a CRC (using SHA3-512) is updated.</li>
<li>If anti-corruption is checked, the 1MB chunk will be split into 128 byte chunks and 13 additional Reed-Solomon (parity) bytes will be added. If decrypting, decode the encoded 1MB chunk to get the raw data.</li> <li>If anti-corruption is checked, the 1MB chunk will be split into 128 byte chunks and 13 additional Reed-Solomon (parity) bytes will be added. If decrypting, decode the encoded 1MB chunk to get the raw data.</li>
<li>If 'Secure wipe' is enabled, CSPRNG data is written over the original file in chunks of 1MB to securely wipe the file.</li> <li>When encryption/decryption is finished, the MAC tag (Poly1305) will be added to the ciphertext or verified, depending on if you're encrypting or decrypting. If 'Secure wipe' is enabled, the original file is securely deleted via system internals.</li>
<li>When encryption/decryption is finished, the MAC tag (Poly1305) will be added to the ciphertext or verified, depending on if you're encrypting or decrypting. If 'Secure wipe' is enabled, the original file is deleted.</li>
<li>Similar to above, the CRC is either checked or added to the ciphertext depending on the operation.</li> <li>Similar to above, the CRC is either checked or added to the ciphertext depending on the operation.</li>
<li>If decrypting, both the CRC and the MAC tag are verified. If either don't match, decryption is unsuccessful and an error message will be displayed. Otherwise, decryption is considered successful and the process is done.</li> <li>If decrypting, both the CRC and the MAC tag are verified. If either don't match, decryption is unsuccessful and an error message will be displayed. Otherwise, decryption is considered successful and the process is done.</li>
</ol> </ol>
Note: the list above is greatly simplified. A lot more is actually happening. Note: the list above is simplified. A lot more is actually happening.
# Roadmap # Roadmap
See <code>Roadmap.md</code> for a list of new features and improvements that I'm working on. See <code>Roadmap.md</code> for a list of new features and improvements that I'm working on.
@ -91,13 +90,13 @@ These are the official Picocrypt social groups and accounts. Be aware of scammer
<ul> <ul>
<li>Max file size is 256GB, due to ChaCha20 cipher itself. The reason for this is that the counter for ChaCha20 will overflow out of the 32-bit range at 256GB. You can split files into chunks for files larger than 256GB.</li> <li>Max file size is 256GB, due to ChaCha20 cipher itself. The reason for this is that the counter for ChaCha20 will overflow out of the 32-bit range at 256GB. You can split files into chunks for files larger than 256GB.</li>
<li>Argon2 may take a while to derive, but realize that this is all for security. Security and speed were never friends and there is always a trade-off between security and speed.</li> <li>Argon2 may take a while to derive a key, but realize that this is all for security. Security and speed were never friends and there is always a trade-off between security and speed.</li>
<li>Encryption/decryption is a little slower than other tools. Picocrypt average speeds ~50MB/s on a medium-class CPU, because a digest is constantly being updated with every chunk. Same as above, security and reliability comes at a slight decrease in speed.</li> <li>Encryption/decryption is a little slower than other tools. Picocrypt average speeds ~50MB/s on a medium-class CPU, because a digest is constantly being updated with every chunk. Same as above, security and reliability comes at a slight decrease in speed.</li>
<li>The portable .exe can be detected as a virus, because it uses 7-Zip's self-extracting archive format to bundle Python along with Picocrypt. I've done my best and submitted it as a false positive to a couple antivirus companies to deal with this. If your antivirus is detecting it as a virus, please help the community and submit it as a false positive to your antivirus provider.</li> <li>The portable executables can be detected as viruses. I've done my best and submitted them as false positives to a couple antivirus companies to deal with this. If your antivirus is detecting Picocrypt as a virus, please help the community and submit it as a false positive to your antivirus provider.</li>
</ul> </ul>
# Contribution # Contribution
If you manage to find a bug or security issue, please create an Issue. If the security problem is severe or critical and could potentially be exploited by hackers if published, please contact me privately <a href="https://evansu.cc/#contacts">here</a>. If one of Picocrypt's dependencies gets a critical security patch, let me know and I'll update the code (if necessary) and recompile the .exe for Windows. I'm also open to suggestions and features (you can leave an Issue or write about it in Discussions). If you find a bug or security issue, please create an Issue. If the security problem is severe or critical and could potentially be exploited by hackers if published, please contact me privately <a href="https://evansu.cc/#contacts">here</a>. If one of Picocrypt's dependencies gets a critical security patch, let me know and I'll update the code (if necessary). I'm also open to suggestions and features (you can leave an Issue or write about it in Discussions).
# Donations # Donations
If you find Picocrypt useful, please consider donating. I've spent countless hours on Picocrypt and I'd love to get Picocrypt along with its dependencies audited by a cybersecurity firm such as Cure53. Audits typically cost <i>thousands</i> of dollars, so I'm asking for your support. If every person who saw this message or uses Picocrypt donated a dollar or two, I'd have enough funds to get Picocrypt audited. For more information about donating, see <a href="Donate.md">here</a>. If you find Picocrypt useful, please consider donating. I've spent countless hours on Picocrypt and I'd love to get Picocrypt along with its dependencies audited by a cybersecurity firm such as Cure53. Audits typically cost <i>thousands</i> of dollars, so I'm asking for your support. If every person who saw this message or uses Picocrypt donated a dollar or two, I'd have enough funds to get Picocrypt audited. For more information about donating, see <a href="Donate.md">here</a>.