Frequently asked questions.
Clear answers about Seeder, encryption, recovery, blockchain storage and the security model behind the application and future hardware.
What is Seeder?
Seeder is a startup building software for encrypted wallet recovery-phrase backups and other encrypted information, together with a dedicated offline hardware device planned for a later phase.
Is Seeder secure?
Seeder encrypts your data so that it cannot be read normally without the correct password. The practical strength of that protection also depends on the quality of your password and the encryption parameters you choose.
We recommend using a long, high-entropy password and the recommended security settings provided by Seeder.
What happens if I lose my Seeder or someone steals it?
Your encrypted records are not tied to one specific Seeder device. Losing or damaging the device therefore does not make the encrypted records dependent on that particular piece of hardware.
You can prepare another Seeder-compatible device and continue using the same workflow, provided that you still know the information required to decrypt your records.
What encryption does Seeder use?
Seeder uses AES-256-GCM for authenticated encryption together with Argon2id for password-based key derivation.
The encrypted result can be represented as a standard text string. This makes it practical to copy, transfer and store the encrypted data, including as data attached to a blockchain transaction.
How can Seeder decrypt encrypted data?
Seeder does not contain a universal decryption key. Decryption depends on the secret password supplied by the user.
Without the correct password and the required encryption parameters, Seeder cannot simply unlock an encrypted record.
How many seed phrases can I encrypt with one Seeder?
There is no fixed number of seed phrases tied to one Seeder. The same device can be used to encrypt and decrypt any number of separate records.
Where are the encrypted records stored?
Records submitted through Seeder are stored as encrypted data on the blockchain.
Blockchain storage makes the encrypted record publicly retrievable and resistant to deletion or modification through the normal application workflow. The readable plaintext is not intended to be stored on-chain.
Are seed phrases stored inside the Seeder device?
No. Seeder is not designed to persistently store your seed phrase.
Sensitive processing takes place in working memory during the active operation. The device is designed so that sensitive input such as the seed itself is not used as permanent device storage.
Does Seeder store any other information on the device?
Seeder stores only the configuration required for its own settings.
It is not designed to persistently store your password, seed phrase, sensitive text, encryption results, logs or fragments of sensitive information.
Can I decrypt data encrypted with someone else's Seeder?
The important distinction is that encryption is not tied to a particular Seeder device.
A Seeder device by itself cannot decrypt someone else's encrypted data. It is simply a tool for performing the encryption and decryption process. Without the correct password, the encrypted data cannot normally be decrypted.
If you legitimately have the correct password and required parameters, you do not need the original physical Seeder that created the encrypted record.
Does the Seeder hardware have communication interfaces?
The planned dedicated Seeder hardware is designed as an offline device without normal communication interfaces such as Wi-Fi, Bluetooth, NFC, cellular connectivity or USB data transfer.
Information is intended to enter or leave the workflow in controlled visual or textual form, for example through QR codes and encrypted text representations.
Can the future Seeder hardware be infected by malware?
The future Seeder hardware is being designed specifically to reduce this attack surface. It is intended to be a dedicated offline device rather than a general-purpose computer or smartphone.
It will not depend on the normal network services and background applications found on everyday devices. Its software is also intended to be open source so that the implementation can be independently inspected.
No security system should be described as absolutely immune to every possible attack, but removing unnecessary software and communication interfaces significantly reduces the available attack surface.
Can malware affect the Seeder mobile app?
The security of the mobile application also depends on the Android environment in which it runs.
Seeder therefore provides a security checklist and we strongly recommend using a separate factory-reset Android phone dedicated exclusively to Seeder, with communication interfaces disabled.
We can design the application and provide safe operating requirements, but we cannot control every device, every Android installation or how an individual user operates their phone.
What should I do with my original seed after encrypting it?
Do not destroy an existing recovery backup simply because you have created an encrypted blockchain backup.
First verify that you can reliably retrieve and decrypt the encrypted record. Seeder should be considered part of a recovery strategy rather than a reason to remove every other verified backup immediately.
Your recovery plan should reflect the value of the wallet and your own risk model.
How do I sign in to the Seeder web application?
The Seeder web administration uses your Slush wallet for wallet connection and access to records associated with that wallet.
What happens if MySeeder.xyz is unavailable in the future?
The encrypted blockchain records are not intended to depend exclusively on the MySeeder.xyz website.
Because the data is stored on the blockchain, the relevant transactions can also be inspected using independent Sui blockchain explorers and other compatible tools.
This is an important part of the architecture: the backup should not depend on one hard drive, one cloud account or one company-operated website remaining available forever.
Is my seed uploaded somewhere while it is being encrypted?
Seeder is designed so that the plaintext seed is processed locally during the encryption operation rather than being uploaded as plaintext for storage.
Sensitive working data is handled in volatile memory during the active operation and is not intended to become persistent application storage.
Is the encryption resistant to brute-force attacks?
AES-256-GCM provides a very strong encryption primitive, while Argon2id is used to make password guessing more computationally expensive.
In a password-based system, however, brute-force resistance depends heavily on password entropy and the selected Argon2id parameters.
With a strong, high-entropy password and appropriately configured parameters, exhaustive password guessing can be made computationally impractical under current hardware assumptions. A weak password cannot be made strong simply by using AES-256.
Where can I find my stored encrypted seed records?
The encrypted record is associated with a blockchain transaction. Storing it requires a blockchain operation, and the encrypted data is included with that transaction.
When you connect the relevant wallet to the Seeder web administration, Seeder can identify the corresponding transactions and present the encrypted records associated with that wallet.
Can I decrypt Seeder data without the app or Seeder hardware?
Yes. Avoiding dependence on one application or one physical device is an important part of the design.
Seeder uses standard cryptographic building blocks and the encrypted format is intended to remain reproducible outside the normal Seeder interface. Encryption and decryption can therefore also be performed using compatible command-line tools when the required password, parameters and data format are known.
The Seeder app and future hardware primarily make this process safer and easier for users who do not want to work directly with cryptographic command-line tools.
Is there another backup besides the Sui blockchain?
Seeder's architecture includes additional redundancy for stored encrypted records.
We also plan to operate our own Sui node infrastructure, which would give Seeder independent access to a complete copy of the relevant blockchain data.
A further copy on a separate blockchain is also being considered for a later phase. VeChain is one possible candidate, but this additional blockchain layer is a future plan rather than a currently active feature.
Where can I view Sui blockchain transactions?
One commonly used Sui blockchain explorer is SuiScan at suiscan.xyz .
Can I encrypt something other than a seed phrase?
Yes. Seeder can also be used for arbitrary text.
Enable Any text in the application Settings and you can encrypt other text using the same general workflow.
Which wallets and recovery phrases are supported?
Seeder supports standard BIP-39 mnemonic phrases with 12 or 24 words and can validate them against the BIP-39 word list and checksum rules.
When the corresponding validation option is disabled, Seeder can also work with text that is not a standard BIP-39 recovery phrase.