Reference record for OID 2.5.44.1

Parent

2.5.44 (algorithm, id-algo, algorithms)

Node code

Node names

encryptionAlgorithm
id-ea
id-algo-mca

Numeric OID

2.5.44.1

URN notation

urn:oid:2.5.44.1

ASN.1 notation

{2 5 44 1}

{joint-iso-itu-t(2) ds(5) algorithm(44) encryptionAlgorithm(1)}
{joint-iso-itu-t(2) ds(5) algorithm(44) id-ea(1)}
{joint-iso-itu-t(2) ds(5) algorithm(44) id-algo-mca(1)}
{joint-iso-itu-t(2) ds(5) id-algo(44) encryptionAlgorithm(1)}
{joint-iso-itu-t(2) ds(5) id-algo(44) id-ea(1)}
{joint-iso-itu-t(2) ds(5) id-algo(44) id-algo-mca(1)}
{joint-iso-itu-t(2) ds(5) algorithms(44) encryptionAlgorithm(1)}
{joint-iso-itu-t(2) ds(5) algorithms(44) id-ea(1)}
{joint-iso-itu-t(2) ds(5) algorithms(44) id-algo-mca(1)}
{joint-iso-ccitt(2) ds(5) algorithm(44) encryptionAlgorithm(1)}
{joint-iso-ccitt(2) ds(5) algorithm(44) id-ea(1)}
{joint-iso-ccitt(2) ds(5) algorithm(44) id-algo-mca(1)}
{joint-iso-ccitt(2) ds(5) id-algo(44) encryptionAlgorithm(1)}
{joint-iso-ccitt(2) ds(5) id-algo(44) id-ea(1)}
{joint-iso-ccitt(2) ds(5) id-algo(44) id-algo-mca(1)}
{joint-iso-ccitt(2) ds(5) algorithms(44) encryptionAlgorithm(1)}
Additional combinations skipped.

OID-IRI notation

/2/5/44/1
/Joint-ISO-ITU-T/5/44/1

Named path variants

/joint-iso-itu-t/ds/algorithm/encryptionAlgorithm
/joint-iso-itu-t/ds/algorithm/id-ea
/joint-iso-itu-t/ds/algorithm/id-algo-mca
/joint-iso-itu-t/ds/id-algo/encryptionAlgorithm
/joint-iso-itu-t/ds/id-algo/id-ea
/joint-iso-itu-t/ds/id-algo/id-algo-mca
/joint-iso-itu-t/ds/algorithms/encryptionAlgorithm
/joint-iso-itu-t/ds/algorithms/id-ea
/joint-iso-itu-t/ds/algorithms/id-algo-mca
/joint-iso-ccitt/ds/algorithm/encryptionAlgorithm
/joint-iso-ccitt/ds/algorithm/id-ea
/joint-iso-ccitt/ds/algorithm/id-algo-mca
/joint-iso-ccitt/ds/id-algo/encryptionAlgorithm
/joint-iso-ccitt/ds/id-algo/id-ea
/joint-iso-ccitt/ds/id-algo/id-algo-mca
/joint-iso-ccitt/ds/algorithms/encryptionAlgorithm
Additional combinations skipped.

Source records

id-ea

Status in source: unspecified.

Names: id-ea

Technical details

{
  "smi_kind": "OBJECT IDENTIFIER",
  "definition": [
    "id-ea",
    "ID",
    "::=",
    "encryptionAlgorithm"
  ]
}

ITU official formal descriptions · Publisher's source file: AlgorithmObjectIdentifiers.html · Official record
Module: AlgorithmObjectIdentifiers
Published definition
```
id-ea                   ID ::= encryptionAlgorithm
```
Module imports
```
{'UsefulDefinitions': ['algorithm'], 'AuthenticationFramework': ['ALGORITHM', 'AlgorithmIdentifier', 'SupportedAlgorithms', 'SupportedCurves']}
```
· Download AlgorithmObjectIdentifiers.html
Related source files and packages:
- ASN.1 class AuthenticationFrameworkFile: ITU-T/formal-language/itu-t/x/x509/2019/AuthenticationFramework.html; 20,677 bytes
Source location: AlgorithmObjectIdentifiers::id-ea.
Source version and references

Published package: ITU-T X.509 2019-10; file: AlgorithmObjectIdentifiers.html.

Downloaded: 2026-10-20T15:07:33.839767+00:00.

id-algo-mca

Status in source: unspecified.

Names: id-algo-mca

Technical details

{
  "smi_kind": "OBJECT IDENTIFIER",
  "definition": [
    "id-algo-mca",
    "OBJECT",
    "IDENTIFIER",
    "::=",
    "{",
    "id-algo",
    "1",
    "}"
  ]
}

ITU official formal descriptions · Publisher's source file: GenAlgo.html · Official record
Module: GenAlgo
Published definition
```
id-algo-mca  OBJECT IDENTIFIER ::= {id-algo 1}
```
Module imports
```
{'PKI-Stub': ['ALGORITHM', 'id-algo']}
```
· Download GenAlgo.html
Related source files and packages:
- Selected import PKI-StubFile: ITU-T/formal-language/itu-t/x/x510/2023/PKI-Stub.html; 9,367 bytes
- ITU-T X.680 (2015) Amd.1 — import version selectionFile: rec/dologin_pub.asp; 447,384 bytes
Source location: GenAlgo::id-algo-mca.
Source version and references

Published package: ITU-T X.510 2020-08; file: GenAlgo.html.

Downloaded: 2026-10-20T15:07:34.876079+00:00.

encryptionAlgorithm

Status in source: unspecified.

Names: encryptionAlgorithm

Technical details

{
  "smi_kind": "OBJECT IDENTIFIER",
  "definition": [
    "encryptionAlgorithm",
    "ID",
    "::=",
    "{",
    "algorithm",
    "1",
    "}"
  ]
}

ITU official formal descriptions · Publisher's source file: AlgorithmObjectIdentifiers.html · Official record
Module: AlgorithmObjectIdentifiers
Published definition
```
encryptionAlgorithm     ID ::= {algorithm 1}
```
Module imports
```
{'UsefulDefinitions': ['algorithm'], 'AuthenticationFramework': ['ALGORITHM', 'AlgorithmIdentifier', 'SupportedAlgorithms', 'SupportedCurves']}
```
· Download AlgorithmObjectIdentifiers.html
Related source files and packages:
- ASN.1 class AuthenticationFrameworkFile: ITU-T/formal-language/itu-t/x/x509/2019/AuthenticationFramework.html; 20,677 bytes
Source location: AlgorithmObjectIdentifiers::encryptionAlgorithm.
Source version and references

Published package: ITU-T X.509 2019-10; file: AlgorithmObjectIdentifiers.html.

Downloaded: 2026-10-20T15:07:33.839767+00:00.

id-algo-mca

Status in source: unspecified.

Names: id-algo-mca

Technical details

{
  "smi_kind": "OBJECT IDENTIFIER",
  "definition": [
    "id-algo-mca",
    "OBJECT",
    "IDENTIFIER",
    "::=",
    "{",
    "id-algo",
    "mca",
    "(",
    "1",
    ")",
    "}"
  ]
}

ITU official formal descriptions · Publisher's source file: GenAlgo.html · Official record
Module: GenAlgo
Published definition
```
id-algo-mca  OBJECT IDENTIFIER ::= {id-algo mca(1) }
```
Module imports
```
{'PKI-Stub': ['ALGORITHM']}
```
· Download GenAlgo.html
Related source files and packages:
- ASN.1 class PKI-StubFile: ITU-T/formal-language/itu-t/x/x510/2023/PKI-Stub.html; 9,367 bytes
Source location: GenAlgo::id-algo-mca.
Source version and references

Published package: ITU-T X.510 2023-10; file: GenAlgo.html.

Downloaded: 2026-10-20T15:07:35.848243+00:00.

First Registration Authority (inferred from ancestor 2.5)

Hoyt Kesterson & R. Exner

Current Registration Authority (inferred from ancestor 2)

ITU-T SG 17 & ISO/IEC JTC 1/SC 6

Direct children (19)

OID	Name	Direct children	Descendants	Description
2.5.44.1.1	id-ea-rsa, id-algo-multipleSignaturesAlgo, multipleSignaturesAlgo	0	0
2.5.44.1.2	id-algo-multipleSymmetricKeyAlgo, multipleSymmetricKeyAlgo, multiplePublicKeyAlgo	0	0
2.5.44.1.3	id-algo-multiplePublicKeyAlgo, multiplePublicKeyAlgo, multipleHashAlgo	0	0
2.5.44.1.4	id-algo-multipleHashAlgo, multipleHashAlgo, multipleKeyEstablishmentAlgo	0	0
2.5.44.1.5	id-algo-multipleAuthenEncryptAlgo, multipleAuthenEncryptAlgo, multipleDataPhaseProtection	0	0
2.5.44.1.6	id-algo-multipleIcvAlgo, multipleIcvAlgo	0	0
2.5.44.1.10	choiceSignatureAlgo	0	0
2.5.44.1.11	choicePublicKeyAlgo	0	0
2.5.44.1.12	choiceHashAlgo	0	0
2.5.44.1.13	choiceKeyEstablishmentAlgo	0	0
2.5.44.1.14	choiceDataPhaseProtection	0	0
2.5.44.1.20	multipleSignaturesAlgoInvoke	0	0
2.5.44.1.21	multiplePublicKeyAlgoInvoke	0	0
2.5.44.1.22	multipleHashAlgoInvoke	0	0
2.5.44.1.23	multipleKeyEstablishmentAlgoInvoke	0	0
2.5.44.1.30	choiceSignatureAlgoInvoke	0	0
2.5.44.1.31	choicePublicKeyAlgoInvoke	0	0
2.5.44.1.32	choiceHashAlgoInvoke	0	0
2.5.44.1.33	choiceKeyEstablishmentAlgoInvoke	0	0

Siblings (7)

OID	Name	Direct children	Descendants
2.5.44.0	nullAlgorithm	0	0
2.5.44.2	hashAlgorithm, id-ha, id-algo-ska	30	80
2.5.44.3	id-sa, signatureAlgorithm, id-algo-aead, id-algo-pka	1	1
2.5.44.4	id-algo-pka, id-algo-ha	0	0
2.5.44.5	id-algo-ha, id-algo-dsa	0	0
2.5.44.6	id-algo-dsa, id-algo-kem	7	7
2.5.44.7	id-algo-kea	7	7