AES-256 Encryption for Crypto Wallets: How Your Keys Stay Safe

When you import your wallet into SOL Wallet Shadow, your private key is encrypted with AES-256-GCM — the same encryption used by governments and banks. Here's what that means in plain English.

What Is Encryption?

Encryption turns readable data into scrambled gibberish that can only be unscrambled with a key (your password). Without the password, the encrypted data is meaningless.

Your Private Key Journey

• •You enter your Solana private key
• •You choose an encryption password
• •The app encrypts your key using AES-256-GCM
• •The encrypted blob is stored in your browser
• •Your original key is wiped from memory
• •To use your key, you enter your password to decrypt it

At no point is your unencrypted private key written to disk or sent anywhere.

AES-256: The Gold Standard

AES stands for Advanced Encryption Standard. The "256" refers to the key size — 256 bits.

How Strong Is It?

AES-256 has 2^256 possible keys. That's: 115,792,089,237,316,195,423,570,985,008,687,907,853,269,984,665,640,564,039,457,584,007,913,129,639,936

To brute-force this number of combinations:

• •Every computer on Earth working together couldn't crack it in a trillion years
• •Even theoretical quantum computers aren't expected to fully break AES-256
• •No known mathematical attack exists against AES-256

Who Else Uses AES-256?

• •US Government (classified documents)
• •Banks and financial institutions
• •Military communications
• •Password managers (1Password, Bitwarden)
• •VPN providers
• •Disk encryption (BitLocker, FileVault)

If it's good enough for classified military communications, it's good enough for your trading wallet.

GCM Mode: Encryption + Authentication

SOL Wallet Shadow uses AES-256-GCM (Galois/Counter Mode), which provides two things:

Confidentiality (Encryption)

Your private key is scrambled. Without your password, it's unreadable.

Authenticity (Authentication)

GCM also verifies that the encrypted data hasn't been tampered with. If someone modifies the encrypted blob, decryption will fail rather than producing corrupted data.

This prevents attacks where someone might try to manipulate the encrypted data without knowing your password.

Key Derivation: From Password to Encryption Key

Your password isn't used directly as the encryption key. Instead, it goes through PBKDF2 (Password-Based Key Derivation Function):

• •Your password is combined with a random salt
• •It's hashed thousands of times
• •The result is a 256-bit encryption key

Why This Matters

• •Short passwords become strong encryption keys
• •The salt prevents rainbow table attacks
• •The multiple hash rounds make brute-forcing slow
• •Even common passwords become unique encryption keys

What's Stored in Your Browser

After encryption, your browser's local storage contains:

• •The encrypted private key (unreadable without password)
• •A random salt (used in key derivation)
• •An initialization vector (used in AES-GCM)

What it does NOT contain:

• •Your password
• •Your unencrypted private key
• •Any data that could help decrypt without the password

Attack Scenarios

Someone Gets Your Encrypted Data

If someone extracts the encrypted blob from your browser's local storage:

• •They can't decrypt it without your password
• •Brute-forcing AES-256 is computationally impossible
• •They'd need to try your password specifically

Someone Gets Your Password

If someone knows your password but doesn't have the encrypted data:

• •They can't do anything without accessing your specific browser
• •Your encrypted key is local to your device

Someone Gets Both

If someone has your encrypted data AND your password, they can decrypt your key. This is why:

• •Use a strong, unique password
• •Don't share your password
• •Don't use the same password you use elsewhere

Best Practices

• •Strong password — Use a long, unique password (12+ characters, mixed types)
• •Don't reuse — This password should be unique to SOL Wallet Shadow
• •Dedicated wallet — Use a trading wallet with limited funds
• •Backup your key — Keep a secure backup of your private key or seed phrase elsewhere
• •Clear when done — If you stop using the app, clear the encrypted key from local storage

SOL Wallet Shadow vs. Other Approaches

Most Trading Bots: Server-Side Keys

Many bots store your private key on their servers. If they get hacked, your key is exposed. With SOL Wallet Shadow, there's no server to hack.

Hardware Wallets: Cold Storage

Hardware wallets are the gold standard for long-term storage. But they can't sign automated copy trades without manual approval each time. SOL Wallet Shadow bridges the gap with strong encryption for active trading wallets.

Brain Wallets: Memory-Based

Memorizing your key provides no encryption at rest and is impractical for active trading.

The Bottom Line

AES-256-GCM encryption is the strongest practical encryption available. Combined with SOL Wallet Shadow's non-custodial architecture, your private key is protected by:

• •Military-grade encryption (AES-256-GCM)
• •Secure key derivation (PBKDF2)
• •Client-side only storage (no servers)
• •Zero-knowledge architecture (we never see your key)

Your security is as strong as your password. Choose it wisely, and your trading wallet is extremely well-protected.