SSH Key Algorithms
Ssh Key Algorithms is a structured technology dataset with 15 entries. Its fields include Algorithm, Type, Typical Size. The source values are preserved as a structured reference table.
Every row is shown below and is also available as CSV, JSON, or Excel.
Dataset details
- Table scope
- All 15 rows
- Fields
- 6 columns
- Source
- Community curated
- Data updated
- Apr 9, 2026
Included fields: Algorithm, Type, Typical Size, Year Standardized, Status in 2026, and 1 more.
The table contains every record in this dataset; the same records are available in each download format.
Preview observations
- Year Standardized span
- 1977 to 2021
- Across 15 preview rows
- Type groups
- 11 distinct values
- Across 15 preview rows
Useful for
- Comparing Algorithm, Type, and Typical Size across technology entries
- Building reference tables, charts, or analyses from 15 downloadable records
Algorithm↕ | Type↕ | Typical Size↕ | Year Standardized↕ | Status in 2026↕ | Known For↕ |
|---|---|---|---|---|---|
Ed25519 | EdDSA on Curve25519 | 256-bit | 2011 | Recommended | Modern default, tiny keys, fast, resistant to side-channel and bad RNG, designed by Daniel J. Bernstein |
RSA 4096 | RSA | 4096-bit | 1977 | Safe but large | Classic choice, slow signing, 4096-bit used as conservative default in corporate environments |
RSA 3072 | RSA | 3072-bit | 1977 | Acceptable | NIST-equivalent of 128-bit symmetric security, sweet spot for RSA compatibility |
RSA 2048 | RSA | 2048-bit | 1977 | Minimum acceptable | Still ubiquitous, fine until ~2030, smallest safely-used RSA size |
RSA 1024 | RSA | 1024-bit | 1977 | Deprecated | Considered broken, rejected by modern OpenSSH defaults, still lurking in legacy systems |
ECDSA P-256 | ECDSA on NIST P-256 | 256-bit | 2000 | Acceptable | Fast, small keys, but vulnerable to bad nonces (see Sony PS3), NIST curve trust issues |
ECDSA P-384 | ECDSA on NIST P-384 | 384-bit | 2000 | Acceptable | Conservative ECDSA option, required by some US government profiles, slower than P-256 |
ECDSA P-521 | ECDSA on NIST P-521 | 521-bit | 2000 | Rarely used | Highest-strength ECDSA in common use, overkill for most workloads |
DSA 1024 | DSA | 1024-bit | 1994 | Disabled by default | Removed as an OpenSSH default in 7.0 (2015), fixed-size, considered obsolete |
Ed448 | EdDSA on Curve448 | 456-bit | 2017 | Emerging | Higher security margin than Ed25519, slower, rarely used but present in modern OpenSSH |
sk-ecdsa-sha2-nistp256 (FIDO) | ECDSA + hardware token | 256-bit | 2020 | Recommended for hardware | Hardware-backed ECDSA tied to YubiKey/FIDO2, requires touch to sign |
sk-ssh-ed25519 (FIDO) | Ed25519 + hardware token | 256-bit | 2020 | Recommended for hardware | Hardware-backed Ed25519, strongest practical SSH key, YubiKey 5+ support |
RSA 8192 | RSA | 8192-bit | 1977 | Paranoid | Used by tinfoil hats, painfully slow, little real-world advantage over RSA 4096 |
ssh-rsa (SHA-1) | RSA + SHA-1 signing | Variable | 1995 | Disabled in OpenSSH 8.8 | Old default signature type, disabled in OpenSSH 8.8 (2021) due to SHA-1 weakness |
Ed25519-SK (resident) | Ed25519 resident key | 256-bit | 2021 | Emerging | Resident key stored on FIDO2 device, portable across machines with just the token |
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Frequently asked questions
How is SSH Key Algorithms organized?
The table starts in the source data's default order. You can sort and filter the loaded rows by the displayed fields.
How much data is available on this page?
This dataset contains 15 entries, and every row is available in the table and in the downloadable files.
Can I download the complete dataset?
Yes. CSV, JSON, and Excel downloads contain all 15 rows. Before republishing the data, review the source and any usage terms listed on this page; dtbse does not replace the original source's licensing terms.
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