Generate compact SHA224 hashes - the 224-bit SHA-2 variant for space-constrained cryptographic applications.
About
SHA224 is a 224-bit hash function from the SHA-2 family, sharing the same internal structure as SHA256 but with different initial values and truncated output, providing a shorter hash output while maintaining the same security level per bit.
Specifications
Output Size224 bits
StandardFIPS 180-4
Standard Year2015
Origin SHA-224 introduction
Origin Year 2004
Use Cases
—Compact digital signatures
—Space-constrained certificate formats
—TLS/SSL cipher suite negotiation
—SSH fingerprint generation
—Embedded system cryptography
Frequently Asked Questions
SHA-224 produces a shorter 224-bit output (28 bytes) compared to SHA-256's 32 bytes. Use it when bandwidth or storage is limited and 112-bit collision resistance is sufficient. It is rarely used today; SHA-256 is generally preferred unless you specifically need the shorter output.
Yes, SHA-224 provides 112-bit collision resistance which is still secure. However, with modern computing power, 128-bit security (SHA-256) is the recommended minimum for new systems. SHA-224 is primarily kept for compatibility with legacy systems.
Not exactly. While SHA-224 uses the same internal processing as SHA-256, it has different initial values (IVs) and produces a different 224-bit output. This is different from simply truncating a SHA-256 hash, which would not provide the same security properties.