TrueCrypt

DEPRECATED: TrueCrypt development ceased in 2014. Use VeraCrypt instead for active development and security updates. This guide is for legacy system recovery only.

Important Information

Status: Abandoned (May 2014)
Successor: VeraCrypt (fork with continued development)
Recommendation: Migrate to VeraCrypt or LUKS for new implementations
Use Case: Only for accessing existing TrueCrypt volumes on legacy systems

Installation (Legacy Systems Only)

Linux (from source)

# Download legacy version
wget https://www.archive.org/download/truecrypt-7.1a/TrueCrypt%207.1a%20Linux%20Kernel%202.4%20-%202.6.tar.gz

# Extract
tar xzf TrueCrypt*.tar.gz
cd truecrypt-7.1a

# Install dependencies
sudo apt-get install build-essential pkg-config libwxgtk2.8-dev

# Compile
./build.sh
sudo ./install

macOS (Intel, legacy)

# Download disk image
curl -L -o truecrypt.dmg \
  "https://archive.org/download/TrueCrypt/TrueCrypt%207.1a.dmg"

# Mount and install
hdiutil mount truecrypt.dmg
cd /Volumes/TrueCrypt\ 7.1a
sudo installer -pkg TrueCrypt\ 7.1a.mpkg -target /

# Unmount
hdiutil unmount /Volumes/TrueCrypt\ 7.1a

Windows (legacy)

# Download installer
$url = "https://archive.org/download/TrueCrypt/TrueCrypt%20Setup%207.1a.exe"
Invoke-WebRequest -Uri $url -OutFile TrueCrypt.exe

# Run installer
.\TrueCrypt.exe

# Command-line installation
TrueCrypt.exe /S /D=C:\Program Files\TrueCrypt

Basic Volume Operations

Create Standard Volume

# GUI (recommended for safety)
truecrypt

# Command-line create
truecrypt --create volume.img --size 1000M --filesystem FAT

# Interactive mode
truecrypt --create
# (Follow prompts for password, encryption, filesystem)

Create Hidden Volume

# Hidden volume in existing TrueCrypt volume
truecrypt --create outer_volume.img

# Then open and create hidden partition within
truecrypt --create

# Interactive process:
# 1. Create outer volume first
# 2. Mount outer volume
# 3. Create hidden volume inside
# 4. Use different password for hidden volume

Mount Volume

# GUI mount
truecrypt

# Command-line mount
truecrypt volume.img /mnt/truecrypt

# Mount with specific slot
truecrypt --mount volume.img --slot 1 /mnt/truecrypt

# Mount read-only
truecrypt --mount-options=ro volume.img /mnt/truecrypt

Dismount Volume

# Dismount specific volume
truecrypt --dismount /mnt/truecrypt

# Dismount by slot
truecrypt --dismount slot1

# Dismount all
truecrypt --dismount-all

# Force dismount
truecrypt --force --dismount /mnt/truecrypt

Volume Management

Create Volume File

# Create 500MB encrypted volume file
truecrypt --create encrypted.img --size 500M

# Create with password
echo "mypassword" | truecrypt --create vol.img --password --size 1G

# Create on USB drive
truecrypt --create /media/usb/secure.img --size 2G --filesystem FAT

Encrypt USB Drive

# Create encrypted partition on USB
truecrypt --create /dev/sdX1 --size 4G

# Create hidden volume on USB
truecrypt --create /dev/sdX1 --hidden

# Mount encrypted USB
truecrypt /dev/sdX1 /mnt/usb

Key and Password Management

Change Password

# Interactive password change
truecrypt --change-password volume.img

# Specify old password
echo "oldpass" | truecrypt --change-password volume.img --password

# Non-interactive (risky, show in history)
truecrypt --change-password volume.img \
  --password "oldpass" \
  --new-password "newpass"

Create Key Files

# Generate random key file
dd if=/dev/urandom of=keyfile.key bs=1024 count=4

# Use key file with volume
truecrypt --create volume.img --keyfile keyfile.key

# Mount with key file
truecrypt --mount volume.img --keyfile keyfile.key /mnt/truecrypt

# Use multiple key files
truecrypt --create volume.img \
  --keyfile keyfile1.key,keyfile2.key

# Mount with multiple key files
truecrypt --mount volume.img \
  --keyfile keyfile1.key,keyfile2.key /mnt/truecrypt

Encryption Ciphers

View Available Ciphers

# List ciphers in GUI
truecrypt -> Settings -> Encryption

# Typical ciphers available:
# - AES (128-bit key)
# - Twofish (128-bit key)
# - Serpent (128-bit key)
# - AES-Twofish
# - AES-Twofish-Serpent
# - Twofish-Serpent

Create with Specific Cipher

# Note: GUI selection required at creation
# Command-line doesn't allow cipher specification

# Mount existing volume
truecrypt volume.img /mnt/truecrypt
# Cipher is stored in volume header

Volume Information

View Volume Details

# Interactive info display
truecrypt --info volume.img

# Display all mounted volumes
truecrypt --list

# Check slot contents
truecrypt --list-slot volume.img

Data Recovery and Backup

Backup Volume Header

# Manual backup (critical for recovery)
dd if=volume.img of=header.bak bs=512 count=1

# From mounted device
dd if=/dev/sdX1 of=header.bak bs=512 count=1

# Restore header
dd if=header.bak of=volume.img bs=512 count=1 seek=0

Recover Forgotten Password

# TrueCrypt has no password recovery
# Options if password forgotten:
# 1. Brute force (not practical, designed to be slow)
# 2. Try common passwords
# 3. If header backup exists, could attempt recovery

# Password isn't stored, it's used to derive the header key
# Once forgotten, volume is effectively inaccessible

Scripting Examples

Automated Mount Script

#!/bin/bash
# TrueCrypt auto-mount (legacy systems)

VOLUME="$HOME/encrypted.img"
MOUNT_POINT="/mnt/secure"
PASSWORD="your_password_here"

# Create mount point
mkdir -p "$MOUNT_POINT"

# Mount with password
echo "$PASSWORD" | \
truecrypt "$VOLUME" "$MOUNT_POINT" --password --text

if [ $? -eq 0 ]; then
    echo "Volume mounted successfully"
else
    echo "Mount failed"
    exit 1
fi

Batch Volume Creation

#!/bin/bash
# Create multiple legacy volumes

SIZES=(500M 1G 2G)
PASSWORDS=("pass1" "pass2" "pass3")

for i in "${!SIZES[@]}"; do
    VOL="volume_${i}.img"
    SIZE="${SIZES[$i]}"
    PASS="${PASSWORDS[$i]}"

    echo "Creating $VOL ($SIZE)..."

    echo "$PASS" | \
    truecrypt --create "$VOL" \
        --size "$SIZE" \
        --password \
        --filesystem FAT \
        --silent

    if [ $? -eq 0 ]; then
        echo "Successfully created $VOL"
    fi
done

Troubleshooting

Common Issues

Issue: “Mount directory not empty”

# Remove contents of mount directory
sudo rm -rf /mnt/truecrypt/*

# Or create new mount point
mkdir -p /mnt/secure
truecrypt volume.img /mnt/secure

Issue: “Not a TrueCrypt volume”

# Corrupted header or wrong password
# Verify file size
ls -lh volume.img

# Try with different password
truecrypt volume.img /mnt/truecrypt

# Check first 512 bytes (header)
hexdump -C volume.img | head

Issue: “Permission denied”

# Run with sudo
sudo truecrypt volume.img /mnt/truecrypt

# Fix mount point permissions
sudo chown $USER:$USER /mnt/truecrypt

# Add user to relevant groups
sudo usermod -a -G disk $USER

Issue: Kernel module not loading

# Install kernel module
sudo truecrypt --install

# Check module
lsmod | grep truecrypt

# Manually load if needed
sudo modprobe truecrypt

Comparison with Modern Alternatives

Feature	TrueCrypt	VeraCrypt	LUKS
Development	Stopped 2014	Active	Active
Security	Good (dated)	Better	Excellent
Cipher Options	Limited	More options	Standard
Hidden Volumes	Yes	Yes	No
Cross-platform	Yes	Yes	Linux only
Performance	Good	Good	Excellent
Recommendation	Legacy only	Modern use	Linux standard

Migration Path

From TrueCrypt to VeraCrypt

# VeraCrypt can mount TrueCrypt volumes
veracrypt volume.img /mnt/truecrypt

# Export data to new VeraCrypt volume
# 1. Mount TrueCrypt volume
# 2. Create VeraCrypt volume with same capacity
# 3. Copy data between mounted volumes
# 4. Verify data integrity
# 5. Securely delete old TrueCrypt volume

From TrueCrypt to LUKS (Linux)

# For partition-based volumes
# 1. Back up all data
# 2. Create LUKS partition
# 3. Restore data to LUKS partition
# 4. Update mount scripts/fstab

# For file-based volumes, use conversion tools or manual migration

Best Practices for Legacy Systems

Backup Regularly: Store encrypted backups on modern systems
Document Setup: Keep encrypted notes on access procedures
Test Recovery: Regularly test accessing volumes
Plan Migration: Develop timeline to move to modern encryption
Monitor Security: Watch for new vulnerabilities in TrueCrypt
Keep Offline Copy: Maintain offline backup of critical volumes

Security Notes

TrueCrypt was considered secure at its time
No major vulnerabilities known as of 2014
Modern ciphers and key derivation functions are stronger
Considered “secure enough” for non-critical legacy data
Not recommended for new deployments

VeraCrypt - Modern successor to TrueCrypt
LUKS - Linux standard encryption
BitLocker - Windows disk encryption
FileVault - macOS disk encryption

Deprecation Notice: This tool is no longer maintained. For new systems, use VeraCrypt or LUKS.

Last updated: 2026-03-30