PKCS

|align="center" | 2.2 || RSA Cryptography Standard

{{cite web

| title = PKCS #1: RSA Cryptography Standard

| url = https://www.emc.com/emc-plus/rsa-labs/standards-initiatives/pkcs-rsa-cryptography-standard.htm

| publisher = RSA Laboratories

}}

|| See {{IETF RFC|8017}}. Defines the mathematical properties and format of RSA public and private keys (ASN.1-encoded in clear-text), and the basic algorithms and encoding/padding schemes for performing RSA encryption, decryption, and producing and verifying signatures.

|align="center" | 1.4 || Diffie–Hellman Key Agreement Standard

{{cite web

| title = PKCS #3: Diffie-Hellman Key Agreement Standard

| url = https://www.emc.com/emc-plus/rsa-labs/standards-initiatives/pkcs-3-diffie-hellman-key-agreement-standar.htm

| publisher = RSA Laboratories

}}

|| A cryptographic protocol that allows two parties that have no prior knowledge of each other to jointly establish a shared secret key over an insecure communications channel.

|align="center" | 2.1 || Password-based Encryption Standard

{{cite web

| title = PKCS #5: Password-Based Cryptography Standard

| url = https://www.emc.com/emc-plus/rsa-labs/standards-initiatives/pkcs-5-password-based-cryptography-standard.htm

| url-status = dead

| archive-url = https://web.archive.org/web/20150407110829/https://www.emc.com/emc-plus/rsa-labs/standards-initiatives/pkcs-5-password-based-cryptography-standard.htm

| archive-date = 2015-04-07

| publisher = RSA Laboratories

}}

{{cite web

| title = PKCS #5 v2.0: Password-Based Cryptography Standard

| url = https://www.foo.be/docs/opensst/ref/pkcs/pkcs-5v2/pkcs5v2-0.pdf

| access-date = May 30, 2024

| date = March 25, 1999

| publisher = RSA Laboratories

}}

|| See {{IETF RFC|8018}} and PBKDF2.

|align="center" | 1.5 ||Cryptographic Message Syntax Standard

{{cite web

| title = PKCS #7: Cryptographic Message Syntax Standard

| url = https://www.emc.com/emc-plus/rsa-labs/standards-initiatives/pkcs-7-cryptographic-message-syntax-standar.htm

| publisher = RSA Laboratories

}}

|| See {{IETF RFC|2315}}. Used to sign and/or encrypt messages under a PKI. Used also for certificate dissemination (for instance as a response to a PKCS #10 message). Formed the basis for S/MIME, which is {{as of | 2010 | lc = on}} based on {{IETF RFC|5652}}, an updated Cryptographic Message Syntax Standard (CMS). Often used for single sign-on.

|align="center" | 2.0 || Selected Attribute Types

{{cite web

| title = PKCS #9: Selected Attribute Types

| url = https://www.emc.com/emc-plus/rsa-labs/standards-initiatives/pkcs-9-selected-attribute-types.htm

| publisher = RSA Laboratories

}}

|| See {{IETF RFC|2985}}. Defines selected attribute types for use in PKCS #6 extended certificates, PKCS #7 digitally signed messages, PKCS #8 private-key information, and PKCS #10 certificate-signing requests.

|align="center" | 3.0 || Cryptographic Token Interface

{{cite web

| title = PKCS #11: Cryptographic Token Interface Standard

| url = https://www.emc.com/emc-plus/rsa-labs/standards-initiatives/pkcs-11-cryptographic-token-interface-standard.htm

| publisher = RSA Laboratories

}}

|| Also known as "Cryptoki". An API defining a generic interface to cryptographic tokens (see also hardware security module). Often used in single sign-on, public-key cryptography and disk encryption[http://www.freeotfe.org/docs/Main/pkcs11_support.htm Security Token/Smartcard Support] in FreeOTFE systems. RSA Security has turned over further development of the PKCS #11 standard to the [http://www.oasis-open.org/committees/pkcs11/ OASIS PKCS 11 Technical Committee].

|align="center" | – || Elliptic-curve cryptography Standard

|| (Apparently abandoned, only reference is a proposal from 1998.)

|align="center" | 1.1 || Cryptographic Token Information Format Standard

{{cite web

| title = PKCS #15: Cryptographic Token Information Format Standard

| url = https://www.emc.com/emc-plus/rsa-labs/standards-initiatives/pkcs-15-cryptographic-token-information-format.htm

| publisher = RSA Laboratories

}}

|| Defines a standard allowing users of cryptographic tokens to identify themselves to applications, independent of the application's Cryptoki implementation (PKCS #11) or other API. RSA has relinquished IC-card-related parts of this standard to ISO/IEC 7816-15.

RSA Laboratories: "[https://www.emc.com/emc-plus/rsa-labs/standards-initiatives/pkcs-15-cryptographic-token-information-format.htm PKCS #15: Cryptographic Token Information Format Standard]".