PGP Compatibility Tables

Public Key Types

Symmetric Cipher Algorithms

Message Digest Algorithms

Compression Algos

PGPdisk

PGP vers.

RSAv3

RSAv4

DH/DSS

IDEA

3DES

CAST5

BFISH

AES128

AES192

AES256

2FISH

MD5

SHA1

RIPEMD

TIGER

SHA256

SHA384

SHA512

none

ZIP

ZLIB

CAST5

2FISH

9x/Me

NT4

Win2K

PGP vers.

8.0 D

2048 (4096)

4096

4096/1024

---

( x )

---

( x )

---

2/4/---

2/---/u

2/32/u

8.0 D

8.0 P

2048 (4096)

4096

4096/1024

---

( x )

---

( x )

---

2/4/---

2/---/u

2/32/u

8.0 P

8.0 FW

2048 (4096)

4096

4096/1024

---

( x )

---

( x )

---

n/a

8.0 FW

PGP vers.

RSAv3

RSAv4

DH/DSS

IDEA

3DES

CAST5

BFISH

AES128

AES192

AES256

2FISH

MD5

SHA1

RIPEMD

TIGER

SHA256

SHA384

SHA512

none

ZIP

ZLIB

CAST5

2FISH

9x/Me

NT4

Win2K

PGP vers.

Public Key Types

Symmetric Cipher Algorithms

Message Digest Algorithms

Compression Algos

PGPdisk

Version Notes

Public Key Notes

Symmetric Cipher Algorithm Notes

Message Digest Algorithm Notes

Compress Algo Notes

PGPdisk Notes

Version Notes

D = Desktop
P = Personal
FW = Freeware

Numbers given are max size in bits.

Examples:

2048 = generate & use up to 2048 bits
(2048) = use up to 2048 bits, but not generate
[2048] = encrypt up to 2048 bits, but not decrypt

X = full use, incl. new keys
( x ) = use, but not on new keys

Note that RSAv3 keys do not include symmetric cipher preferences. PGP defaults to IDEA when using RSAv3 keys.

X = full use, incl. new keys
( x ) = use, but not on new keys

Note that PGP does not append compression algorithm preferences on the keys it creates. PGP defaults to ZIP.

The 9x/Me, NT4, & Win2K columns give the max size in gb of container volumes when those volumes are formated FAT16/FAT32/NTFS respectively.

Examples:

2/4/---: FAT16 max is 2gb, FAT32 max is 4gb, NTFS is not supported.

4/32/u: FAT16 max is 4gb, FAT32 max is 32gb, NTFS max is unknown/unlimited.

Note that the file system of the host drive will also constrain the allowed max size of a PGPdisk volume. Generally speaking, NTFS host drives will allow larger PGPdisk volumes. On PGP 8.0, FAT16/32 host drives limit the max volume size to 4gb on WinNT4 & Win2K; on Win9x/Me, FAT16 host drives limit volume size to 2gb and FAT32 host drives limit volume size to 4gb. For more detailed info on PGPdisk Volume Sizes, see THIS page.

Note that PGPdisk from PGP 8.0 builds will automatically upgrade existing PGPdisk volumes from PGP 6.5.x, 6.0.x, and PGPdisk 1.0 to the new PGPdisk format used by PGP 8.0.

D = Desktop
P = Personal
FW = Freeware

Public Key Types

Symmetric Cipher Algorithms

Message Digest Algorithms

Compression Algos

PGPdisk

PGP vers.

RSAv3

RSAv4

DH/DSS

IDEA

3DES

CAST5

BFISH

AES128

AES192

AES256

2FISH

MD5

SHA1

RIPEMD

TIGER

SHA256

SHA384

SHA512

none

ZIP

ZLIB

CAST5

2FISH

9x/Me

NT4

Win2K

PGP vers.

7.1.1 CD

2048 (4096)

4096

4096/1024

---

( x )

---

( x )

---

2/4/---

2/---/u

2/32/u

7.1.1 CD

7.1.0 CD

2048 (4096)

4096

4096/1024

---

( x )

---

( x )

---

2/4/---

2/---/u

2/32/u

7.1.0 CD

7.0.4 DS

2048 (4096)

4096

4096/1024

---

( x )

---

( x )

---

2/4/---

2/---/u

2/32/u

7.0.4 DS

7.0.3 DS

2048 (4096)

4096

4096/1024

---

( x )

---

( x )

---

2/4/---

2/---/u

2/32/u

7.0.3 DS

7.0.3 PS

2048 (4096)

4096

4096/1024

---

( x )

---

( x )

---

2/4/---

2/---/u

2/32/u

7.0.3 PS

7.0.3 FW

2048 (4096)

4096

4096/1024

---

( x )

---

( x )

---

n/a

7.0.3 FW

7.0.2 DS

2048 (4096)

4096

4096/1024

---

( x )

---

( x )

---

2/4/---

2/---/u

2/32/u

7.0.2 DS

2048 (4096)

4096

4096/1024

---

( x )

---

( x )

---

2/4/---

2/---/u

2/32/u

7.0.2 DS

7.0.1 DS

2048 (4096)

4096

4096/1024

---

( x )

---

( x )

---

2/4/---

2/---/u

2/32/u

7.0.1 DS

7.0 DS

2048

4096/1024

---

( x )

---

( x )

---

2/4/---

2/---/u

2/32/u

7.0 DS

PGP vers.

RSAv3

RSAv4

DH/DSS

IDEA

3DES

CAST5

BFISH

AES128

AES192

AES256

2FISH

MD5

SHA1

RIPEMD

TIGER

SHA256

SHA384

SHA512

none

ZIP

ZLIB

CAST5

2FISH

9x/Me

NT4

Win2K

PGP vers.

Public Key Types

Symmetric Cipher Algorithms

Message Digest Algorithms

Compression Algos

PGPdisk

Version Notes

Public Key Notes

Symmetric Cipher Algorithm Notes

Message Digest Algorithm Notes

Compress Algo Notes

PGPdisk Notes

Version Notes

CD = Corporate Desktop
DS = Desktop Security
BS = Business Security
PS = Personal Security
PE = Personal Edition
PP = Personal Privacy
FW = Freeware
i = international
ic = international corp.
Q = Qualcomm
rsa = RSA ed.
dh = Diffie-Hellman ed.

Numbers given are max size in bits.

Examples:

2048 = generate & use up to 2048 bits
(2048) = use up to 2048 bits, but not generate
[2048] = encrypt up to 2048 bits, but not decrypt

X = full use, incl. new keys
( x ) = use, but not on new keys

Note that RSAv3 keys do not include symmetric cipher preferences. PGP defaults to IDEA when using RSAv3 keys.

X = full use, incl. new keys
( x ) = use, but not on new keys

Note that PGP does not append compression algorithm preferences on the keys it creates. PGP defaults to ZIP.

The 9x/Me, NT4, & Win2K columns give the max size in gb of container volumes when those volumes are formated FAT16/FAT32/NTFS respectively.

Examples:

2/4/---: FAT16 max is 2gb, FAT32 max is 4gb, NTFS is not supported.

4/32/u: FAT16 max is 4gb, FAT32 max is 32gb, NTFS max is unknown/unlimited.

Note that the file system of the host drive will also constrain the allowed max size of a PGPdisk volume. Generally speaking, NTFS host drives will allow larger PGPdisk volumes. On PGP 7.x, FAT16/32 host drives limit the max volume size to 4gb on WinNT4 & Win2K; on Win9x/Me, FAT16 host drives limit volume size to 2gb and FAT32 host drives limit volume size to 4gb. For more detailed info on PGPdisk Volume Sizes, see THIS page.

Note that PGPdisk from PGP 7.x builds will automatically upgrade existing PGPdisk volumes from PGP 6.5.x, 6.0.x, and PGPdisk 1.0 to the new PGPdisk format used by PGP 7.x.

Public Key Types

Symmetric Cipher Algorithms

Message Digest Algorithms

Compression Algos

PGPdisk

PGP vers.

RSAv3

RSAv4

DH/DSS

IDEA

3DES

CAST5

BFISH

AES128

AES192

AES256

2FISH

MD5

SHA1

RIPEMD

TIGER

SHA256

SHA384

SHA512

none

ZIP

ZLIB

CAST5

2FISH

9x/Me

NT4

Win2K

PGP vers.

6.5.8 DS

2048

---

4096/1024

---

( x )

---

( x )

---

2/---/---

2/---/u

2/32/u

6.5.8 DS

6.5.8 PP

2048

---

4096/1024

---

( x )

---

( x )

---

2/---/---

2/---/u

2/32/u

6.5.8 PP

6.5.8 FW

2048

---

4096/1024

---

( x )

---

( x )

---

n/a

6.5.8 FW

6.5.7 FW

2048

---

4096/1024

---

( x )

---

( x )

---

n/a

6.5.7 FW

6.5.3 DS

2048

---

4096/1024

---

( x )

---

( x )

---

2/---/---

2/---/u

2/32/u

6.5.3 DS

6.5.3 PP

2048

---

4096/1024

---

( x )

---

( x )

---

2/---/---

2/---/u

2/32/u

6.5.3 PP

6.5.3 FW

2048

---

4096/1024

---

( x )

---

( x )

---

n/a

6.5.3 FW

6.5.2a DS

2048

---

4096/1024

---

( x )

---

( x )

---

2/---/---

2/---/u

2/32/u

6.5.2a DS

6.5.2a PP

2048

---

4096/1024

---

( x )

---

( x )

---

2/---/---

2/---/u

2/32/u

6.5.2a PP

6.5.2a FW

2048

---

4096/1024

---

( x )

---

( x )

---

n/a

6.5.2a FW

6.5.2 DS

2048

---

4096/1024

---

( x )

---

( x )

---

2/---/---

2/---/u

2/32/u

6.5.2 DS

6.5.1i

2048

---

4096/1024

---

( x )

---

( x )

---

n/a

6.5.1i

6.5.1 DS

2048

---

4096/1024

---

( x )

---

( x )

---

2/---/---

2/---/u

n/a

6.5.1 DS

6.5.1 PP

2048

---

4096/1024

---

( x )

---

( x )

---

2/---/---

2/---/u

n/a

6.5.1 PP

6.5.1 FW

2048

---

4096/1024

---

( x )

---

( x )

---

n/a

6.5.1 FW

6.5.0 DS rsa

2048

---

4096/1024

---

( x )

---

( x )

---

2/---/---

2/---/u

---/---/u

6.5.0 DS rsa

6.5.0 DS dh

(2048)

---

4096/1024

---

( x )

---

( x )

---

2/---/---

2/---/u

---/---/u

6.5.0 DS dh

PGP vers.

RSAv3

RSAv4

DH/DSS

IDEA

3DES

CAST5

BFISH

AES128

AES192

AES256

2FISH

MD5

SHA1

RIPEMD

TIGER

SHA256

SHA384

SHA512

none

ZIP

ZLIB

CAST5

2FISH

9x/Me

NT4

Win2K

PGP vers.

Public Key Types

Symmetric Cipher Algorithms

Message Digest Algorithms

Compression Algos

PGPdisk

Version Notes

Public Key Notes

Symmetric Cipher Algorithm Notes

Message Digest Algorithm Notes

Compress Algo Notes

PGPdisk Notes

Version Notes

Numbers given are max size in bits.

Examples:

2048 = generate & use up to 2048 bits
(2048) = use up to 2048 bits, but not generate
[2048] = encrypt up to 2048 bits, but not decrypt

X = full use, incl. new keys
( x ) = use, but not on new keys

Note that RSAv3 keys do not include symmetric cipher preferences. PGP defaults to IDEA when using RSAv3 keys.

X = full use, incl. new keys
( x ) = use, but not on new keys

Note that PGP does not append compression algorithm preferences on the keys it creates. PGP defaults to ZIP.

The 9x/Me, NT4, & Win2K columns give the max size in gb of container volumes when those volumes are formated FAT16/FAT32/NTFS respectively.

Examples:

2/4/---: FAT16 max is 2gb, FAT32 max is 4gb, NTFS is not supported.

4/32/u: FAT16 max is 4gb, FAT32 max is 32gb, NTFS max is unknown/unlimited.

Note that the file system of the host drive will also constrain the allowed max size of a PGPdisk volume. Generally speaking, NTFS host drives will allow larger PGPdisk volumes. On PGP 6.5.x, FAT16/32 host drives limit the max volume size to 2gb. For more detailed info on PGPdisk Volume Sizes, see THIS page.

Note that PGPdisk from PGP 6.5.x builds will automatically upgrade existing PGPdisk volumes from PGP 6.0.0 and PGPdisk 1.0 to the newer PGPdisk format used by PGP 6.0.2 and 6.5.x.

	Public Key Types			Symmetric Cipher Algorithms								Message Digest Algorithms							Compression Algos			PGPdisk
PGP vers.	RSAv3	RSAv4	DH/DSS	IDEA	3DES	CAST5	BFISH	AES128	AES192	AES256	2FISH	MD5	SHA1	RIPEMD	TIGER	SHA256	SHA384	SHA512	none	ZIP	ZLIB	CAST5	2FISH	9x/Me	NT4	Win2K	PGP vers.
6.0.2 BS rsa	2048	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	X	---	2/---/---	2/---/u	---/---/u	6.0.2 BS rsa
6.0.2 DS rsa	2048	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	X	---	2/---/---	2/---/u	---/---/u	6.0.2 DS rsa
6.0.2 PP rsa	2048	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	X	---	2/---/---	2/---/u	---/---/u	6.0.2 PP rsa
6.0.2 DS dh	(2048)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	X	---	2/---/---	2/---/u	---/---/u	6.0.2 DS dh
6.0.2 PE dh	(2048)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	X	---	2/---/---	2/---/u	---/---/u	6.0.2 PE dh
6.0.2 PP dh	(2048)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	X	---	2/---/---	2/---/u	---/---/u	6.0.2 PP dh
6.0.2 FW dh	(2048)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	6.0.2 FW dh
6.0.2i	(2048)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	X	---	2/---/---	2/---/u	---/---/u	6.0.2i
6.0.1 DS rsa	2048	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	X	---	2/---/---	2/---/u	---/---/u	6.0.2 DS rsa
6.0.1 PP rsa	(2048)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	X	---	2/---/---	2/---/u	---/---/u	6.0.2 PP rsa
6.0.0a PP rsa	(4096)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	X	---	2/---/---	2/---/u	---/---/u	6.0.0a PP rsa
6.0.0 BS rsa	2048 (4096)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	X	---	2/---/---	2/---/u	---/---/u	6.0.0 DS rsa
6.0.0 PP rsa	2048 (4096)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	X	---	2/---/---	2/---/u	---/---/u	6.0.0 PP rsa
6.0.0 BS dh	---	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	X	---	2/---/---	2/---/u	---/---/u	6.0.0 DS dh
6.0.0 PP dh	---	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	X	---	2/---/---	2/---/u	---/---/u	6.0.0 PP dh
6.0.0 FW dh	---	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	6.0.0 FW dh
PGP vers.	RSAv3	RSAv4	DH/DSS	IDEA	3DES	CAST5	BFISH	AES128	AES192	AES256	2FISH	MD5	SHA1	RIPEMD	TIGER	SHA256	SHA384	SHA512	none	ZIP	ZLIB	CAST5	2FISH	9x/Me	NT4	Win2K	PGP vers.
	Public Key Types			Symmetric Cipher Algorithms								Message Digest Algorithms							Compression Algos			PGPdisk

Version Notes

Public Key Notes

Symmetric Cipher Algorithm Notes

Message Digest Algorithm Notes

Compress Algo Notes

PGPdisk Notes

Version Notes

Numbers given are max size in bits.

Examples:

2048 = generate & use up to 2048 bits
(2048) = use up to 2048 bits, but not generate
[2048] = encrypt up to 2048 bits, but not decrypt

X = full use, incl. new keys
( x ) = use, but not on new keys

Note that RSAv3 keys do not include symmetric cipher preferences. PGP defaults to IDEA when using RSAv3 keys.

X = full use, incl. new keys
( x ) = use, but not on new keys

Note that PGP does not append compression algorithm preferences on the keys it creates. PGP defaults to ZIP.

The 9x/Me, NT4, & Win2K columns give the max size in gb of container volumes when those volumes are formated FAT16/FAT32/NTFS respectively.

Examples:

2/4/---: FAT16 max is 2gb, FAT32 max is 4gb, NTFS is not supported.

4/32/u: FAT16 max is 4gb, FAT32 max is 32gb, NTFS max is unknown/unlimited.

Note that the file system of the host drive will also constrain the allowed max size of a PGPdisk volume. Generally speaking, NTFS host drives will allow larger PGPdisk volumes. On PGP 6.0.x, FAT16/32 host drives limit the max volume size to 2gb. For more detailed info on PGPdisk Volume Sizes, see THIS page.

Note that PGPdisk from PGP 6.0.2 builds will automatically upgrade existing PGPdisk volumes from PGP 6.0.0 and PGPdisk 1.0 to the newer PGPdisk format used by PGP 6.0.2 (and 6.5.x).

	Public Key Types			Symmetric Cipher Algorithms								Message Digest Algorithms							Compression Algos			PGPdisk
PGP vers.	RSAv3	RSAv4	DH/DSS	IDEA	3DES	CAST5	BFISH	AES128	AES192	AES256	2FISH	MD5	SHA1	RIPEMD	TIGER	SHA256	SHA384	SHA512	none	ZIP	ZLIB	CAST5	2FISH	9x/Me	NT4	Win2K	PGP vers.
PGP 5.5.5 BS	2048 (8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5.5 BS
PGP 5.5.5 PP	(8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5.5 PP
PGP 5.5.5 FW	---	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5.5 FW
PGP 5.5.3i	2048 (8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5.3i
PGP 5.5.3 BS	2048 (8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5.3 BS
PGP 5.5.3 PP	(8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5.3 PP
PGP 5.5.3 FW	---	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5.3 FW
PGP 5.5.2 BS	2048 (8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5.2 BS
PGP 5.5.2 PP	2048 (8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5.2 PP
PGP 5.5.2 FW	---	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5.2 FW
PGP 5.5.1 BS	2048 (8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5.1 BS
PGP 5.5.1 PP	2048 (8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5.1 PP
PGP 5.5.1 FW	---	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5.1 FW
PGP 5.5 Q rsa	(8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5 Q rsa
PGP 5.5 Q dh	---	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5 Q dh
PGP 5.5 BS	2048 (8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5 BS
PGP 5.5 PP	2048 (8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5 PP
PGP 5.5 FW	---	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.5 FW
PGP 5.0ic	2048 (8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.0ic
PGP 5.0i	(8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.0i
PGP 5.0 Q rsa	2048 (8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.0 Q rsa
PGP 5.0 Q dh	---	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.0 Q dh
PGP 5.0 PP	2048 (8192)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.0 PP
PGP 5.0 FW	(2048)	---	4096/1024	X	X	X	---	---	---	---	---	X	X	( x )	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGP 5.0 FW
PGPmail 4.5	2048	---	---	X	---	---	---	---	---	---	---	X	---	---	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	PGPmail 4.5
ViaCrypt PGP 4.0	2048	---	---	X	---	---	---	---	---	---	---	X	---	---	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	ViaCrypt PGP 4.0
2.6.2i	2048	---	---	X	---	---	---	---	---	---	---	X	---	---	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	2.6.2i
2.6.2	2047 (2048)*	---	---	X	---	---	---	---	---	---	---	X	---	---	---	---	---	---	( x )	X	---	n/a	n/a	n/a	n/a	n/a	2.6.2
PGP vers.	RSAv3	RSAv4	DH/DSS	IDEA	3DES	CAST5	BFISH	AES128	AES192	AES256	2FISH	MD5	SHA1	RIPEMD	TIGER	SHA256	SHA384	SHA512	none	ZIP	ZLIB	CAST5	2FISH	9x/Me	NT4	Win2K	PGP vers.
	Public Key Types			Symmetric Cipher Algorithms								Message Digest Algorithms							Compression Algos			PGPdisk

Version Notes

Public Key Notes

Symmetric Cipher Algorithm Notes

Message Digest Algorithm Notes

Compress Algo Notes

PGPdisk Notes

Version Notes

Numbers given are max size in bits.

Examples:

2048 = generate & use up to 2048 bits
(2048) = use up to 2048 bits, but not generate
[2048] = encrypt up to 2048 bits, but not decrypt

* PGP 2.6.2 contains a bug that causes PGP to generate 2047 bit RSAv3 keys even when 2048 bit keys (the max) are requested. It can use true 2048 bit RSAv3 keys generated by other versions of PGP.

X = full use, incl. new keys
( x ) = use, but not on new keys

Note that RSAv3 keys do not include symmetric cipher preferences. PGP defaults to IDEA when using RSAv3 keys.

X = full use, incl. new keys
( x ) = use, but not on new keys

Note that PGP does not append compression algorithm preferences on the keys it creates. PGP defaults to ZIP.

No version of PGP 5.x or PGP 2.x includes PGPdisk.

Public Key Types

Symmetric Cipher Algorithms

Message Digest Algorithms

Compression Algos

PGPdisk

PGP vers.

RSAv3

RSAv4

DH/DSS

IDEA

3DES

CAST5

BFISH

AES128

AES192

AES256

2FISH

MD5

SHA1

RIPEMD

TIGER

SHA256

SHA384

SHA512

none

ZIP

ZLIB

CAST5

2FISH

9x/Me

NT4

Win2K

PGP vers.

6.5.8ckt 09

16384

8192/1024

( x )

---

2/---/---

4/---/u

4/32/u

6.5.8ckt 09

6.5.8ckt 08

16384

8192/1024

( x )

---

2/---/---

4/---/u

4/32/u

6.5.8ckt 08

6.5.8ckt 07

16384

8192/1024

---

( x )

---

2/---/---

4/---/u

4/32/u

6.5.8ckt 07

6.5.8ckt 06

16384

8192/1024

---

( x )

---

2/---/---

4/---/u

4/32/u

6.5.8ckt 06

6.5.8ckt 05

16384

8192/1024

---

( x )

---

2/---/---

4/---/u

4/32/u

6.5.8ckt 05

6.5.8ckt 04

16384

---

8192/1024

---

( x )

---

2/---/---

4/---/u

4/32/u

6.5.8ckt 04

6.5.8ckt 03

16384

---

8192/1024

---

( x )

---

2/---/---

4/---/u

4/32/u

6.5.8ckt 03

6.5.8ckt 02

16384

---

8192/1024

---

( x )

---

2/---/---

4/---/u

4/32/u

6.5.8ckt 02

6.5.8ckt 01

16384

---

8192/1024

---

( x )

---

2/---/---

4/---/u

4/32/u

6.5.8ckt 01

6.0.2ckt 07

16384

---

8192/1024

---

( x )

---

2/---/---

4/---/u

4/32/u

6.0.2ckt 07

6.0.2ckt 05

16384

---

8192/1024

---

( x )

---

2/---/---

4/---/u

---/---/u

6.0.2ckt 05

PGP 5.5.3a

2048

---

4096/1024

---

( x )

---

( x )

---

n/a

PGP 5.5.3a

PGP 5.5.3ckt reg

16384

---

8192/2048

---

( x )

---

( x )

---

n/a

PGP 5.5.3ckt r

PGP 5.5.3ckt san

2048

---

4096/1024

---

( x )

---

( x )

---

n/a

PGP 5.5.3ckt s

PGP 5.5.3 iaLP

8192

---

4096/1024

---

( x )

---

( x )

---

n/a

PGP 5.5.3 iaLP

2.6.3ia-multi06

8192

---

( x )

---

n/a

2.6.3ia-multi06

2.6.3ia-multi05a

8192

---

( x )

---

n/a

2.6.3ia-multi05a

2.6.3ia-multi05

8192

---

( x )

---

n/a

2.6.3ia-multi05

2.6.3ia-multi04

8192

---

( x )

---

n/a

2.6.3ia-multi04

2.6.3ia-multi03

4096

---

( x )

---

n/a

2.6.3ia-multi03

2.6.3ia-multi02

4096

---

( x )

---

n/a

2.6.3ia-multi02

2.6.3ia-multi

4096

---

( x )

---

n/a

2.6.3ia-multi

2.6.3ia-cb

4096

---

( x )

---

n/a

2.6.3ia-cb

2.6.3ia-c

4096

---

( x )

---

n/a

2.6.3ia-c

2.6.3ia

2048

---

( x )

---

n/a

2.6.3ia

PGP vers.

RSAv3

RSAv4

DH/DSS

IDEA

3DES

CAST5

BFISH

AES128

AES192

AES256

2FISH

MD5

SHA1

RIPEMD

TIGER

SHA256

SHA384

SHA512

none

ZIP

ZLIB

CAST5

2FISH

9x/Me

NT4

Win2K

PGP vers.

Public Key Types

Symmetric Cipher Algorithms

Message Digest Algorithms

Compression Algos

PGPdisk

Version Notes

Public Key Notes

Symmetric Cipher Algorithm Notes

Message Digest Algorithm Notes

Compress Algo Notes

PGPdisk Notes

Version Notes

Numbers given are max size in bits.

Examples:

2048 = generate & use up to 2048 bits
(2048) = use up to 2048 bits, but not generate
[2048] = encrypt up to 2048 bits, but not decrypt

X = full use, incl. new keys
( x ) = use, but not on new keys

Note that RSAv3 keys do not include symmetric cipher preferences. PGP defaults to IDEA when using RSAv3 keys.

X = full use, incl. new keys
( x ) = use, but not on new keys

Note that PGP does not append message digest algorithm preferences on the keys it creates. PGP defaults to MD5 for RSAv3 keys and SHA1 for DH/DSS keys. For RSAv4 keys, PGP 7.0.x versions use MD5, while the newer 7.1.x versions use SHA1. Interestingly, the PGP 6.5.8ckt versions allow users to specify their own message digest algorithm preferences (while official versions of PGP do not).

X = full use, incl. new keys
( x ) = use, but not on new keys

Note that PGP does not append compression algorithm preferences on the keys it creates. PGP defaults to ZIP.

The 9x/Me, NT4, & Win2K columns give the max size in gb of container volumes when those volumes are formated FAT16/FAT32/NTFS respectively.

Examples:

2/4/---: FAT16 max is 2gb, FAT32 max is 4gb, NTFS is not supported.

4/32/u: FAT16 max is 4gb, FAT32 max is 32gb, NTFS max is unknown/unlimited.

Note that the file system of the host drive will also constrain the allowed max size of a PGPdisk volume. Generally speaking, NTFS host drives will allow larger PGPdisk volumes. On PGP 6.5.8ckt, FAT16/32 host drives limit the max volume size to 4gb on WinNT4 & Win2K; on Win9x/Me, FAT16/32 host drives limit volume size to 2gb. For more detailed info on PGPdisk Volume Sizes, see THIS page.

Public Key Types

Symmetric Cipher Algorithms

Message Digest Algorithms

Compression Algos

PGPdisk

PGP vers.

RSAv3

RSAv4

DH/DSS

IDEA

3DES

CAST5

BFISH

AES128

AES192

AES256

2FISH

MD5

SHA1

RIPEMD

TIGER

SHA256

SHA384

SHA512

none

ZIP

ZLIB

CAST5

2FISH

9x/Me

NT4

Win2K

PGP vers.

GPG 1.2.1 n

4096 (8192)*

4096 (8192)

n/a

GPG 1.2.1 n

GPG 1.2.1

(8192)

4096 (8192)

---

n/a

GPG 1.2.1

GPG 1.2.0 n

4096 (8192)*

4096 (8192)

n/a

GPG 1.2.0 n

GPG 1.2.0

(8192)

4096 (8192)

---

n/a

GPG 1.2.0

GPG 1.1.92

(8192)

4096 (8192)

---

n/a

GPG 1.1.92

GPG 1.1.91 n

4096 (8192)*

4096 (8192)

n/a

GPG 1.1.91 n

GPG 1.1.91

(8192)

4096 (8192)

---

n/a

GPG 1.1.91

GPG 1.1.90 n

4096 (8192)*

4096 (8192)

n/a

GPG 1.1.90 n

GPG 1.1.90

(8192)

4096 (8192)

X+

X #

n/a

GPG 1.1.90

GPG 1.0.7a n

4096 (8192)*

4096 (8192)

n/a

GPG 1.0.7 n

4096 (8192)*

4096 (8192)

X+

X #

n/a

GPG 1.0.7 n

GPG 1.0.7

(8192)

4096 (8192)

X+

X #

n/a

GPG 1.0.7

GPG 1.0.6 n

(4096)

4096

X+

X #

n/a

GPG 1.0.6 n

GPG 1.0.6

(4096)

4096

X+

X #

n/a

GPG 1.0.6

GPG 1.0.5

(4096)

4096

X+

X #

n/a

GPG 1.0.5

GPG 1.0.4

(2048) [4096]**

(4096)

4096

---

X+

X #

n/a

GPG 1.0.4

GPG 1.0.3

(2048) [4096]**

(4096)

4096

---

n/a

GPG 1.0.3

GPG 1.0.2

---

4096

---

n/a

GPG 1.0.2

GPG 1.0.1

---

4096

---

n/a

GPG 1.0.1

GPG 1.0.0

---

4096

---

n/a

GPG 1.0.0

PGP vers.

RSAv3

RSAv4

DH/DSS

IDEA

3DES

CAST5

BFISH

AES128

AES192

AES256

2FISH

MD5

SHA1

RIPEMD

TIGER

SHA256

SHA384

SHA512

none

ZIP

ZLIB

CAST5

2FISH

9x/Me

NT4

Win2K

PGP vers.

Public Key Types

Symmetric Cipher Algorithms

Message Digest Algorithms

Compression Algos

PGPdisk

Version Notes

Public Key Notes

Symmetric Cipher Algorithm Notes

Message Digest Algorithm Notes

Compress Algo Notes

PGPdisk Notes

Version Notes

n = "Nullify" build

Numbers given are max size in bits.

Examples:

2048 = generate & use up to 2048 bits
(2048) = use up to 2048 bits, but not generate
[2048] = encrypt up to 2048 bits, but not decrypt

* = includes RSAv3 key generation patch.

Note that while most versions of GPG will at least use RSAv3 keys, the IDEA extension must be loaded in order for GPG to be fully PGP 2.x compatible (PGP defaults to IDEA as the symmetric cipher for RSAv3 keys, the only key type it uses). ** GPG 1.0.4 and earlier will not load the IDEA extension, thus nixing PGP 2.x compatibility.

X = full use, incl. new keys
( x ) = use, but not on new keys

* w/ IDEA extension

Note that RSAv3 keys do not include symmetric cipher preferences.

X = full use, incl. new keys
( x ) = use, but not on new keys

+ = with TIGER192 extension
# = with SHA2 extension

Note that RSAv3 keys do not include message digest algorithm preferences.

X = full use, incl. new keys
( x ) = use, but not on new keys

Note that RSAv3 keys do not include compression algorithm preferences.

PGPdisk is not availble with any version of GPG.

n = "Nullify" build

In addition to checking out many versions of PGP and GPG and consulting the accompanying documentation
(e.g., ReadMe.txt, WhatsNew.txt, et al), I have also relied upon the following excellent sources for information
on things PGP and GPG:

A special thanks to Tom McCune for taking the time to look over this page and point out several egregious errors.

For information on the compatibility of PGP add-on components with different versions of Windows, see: